Laser heating comsol. 在 COMSOL Multiphysics 6.

Laser heating comsol com Case 3: Moving laser with constant power • This model investigates the transient heating of a glass slab when an incident laser beam in CW mode shines upon it for a given time. EST Heat Transfer & Phase Change, Materials, Modeling Tools & Definitions, Parameters, Variables, & Functions Version 5. May 10, 2019 · BLOG Modeling the Pulsed Laser Heating of Semitransparent Materials; FORUM laser heating of a silicon wafer; FORUM Laser Heating of a Silicon Wafer Model ID: 13835; BLOG Implementing a Simple Temperature Controller with a Component Coupling; KNOWLEDGE BASE Solving electromagnetic heating models with high-frequency loads May 15, 2017 · Dear Joel, You're correct, this example was using a normalization of the Gaussian that isn't typical in the literature (although it did still give the correct total heat load. Oct 5, 2023 · Hi, guys. I am trying to simulate the temperature distribution of thin film multilayer structure under laser heating with 2d axisymmetric geometry. この方程式は, COMSOL Multiphysics ® ソフトウェア内の輻射ビーム (吸収媒体) インターフェースを使用して求解されます. Assuming the Electromagnetic wave plus the heat transfer will do the job. 特定の機能が複数の製品に共通している場合もあります. Figure 1. Numerical simulation of laser heating is a very important approach to understand the In the latest version of COMSOL (5. The average, maximum, and minimum temperatures, as well as the peak temperature difference Jan 3, 2023 · The laser is on for 75 ms and then off for 25 ms, or the laser uses pulsed heating with a 75 percent duty cycle and 100 ms period. Also what I find interesting and very valuable is a 3D guassian Maxwell representation for a laser. simulations include heat transfer in fluids, chemical reactions, and structural mechanics, as well as mass transport and fluid flow. I have the laser shot at the plate, but I do not understand what happens from there. Since laser irradiation exhibits a Gaussian profile in COMSOL simulation tutorial for laser heating and thermal expansion effects on WGM resonators. Oct 13, 2020 · Dear all, I am trying to observe the effect on a piezo device of the laser heating but i am not able to find a way to define my source, i mean wavelength, beam, power of my laser(led). One of the most practical examples of such a heat source is a laser. I have already got spatial and temporal temperature distribution from "heat transfer in solid" model in comsol 4. Mar 22, 2013 · I am trying to determine residual stress on a metallic ribbon (28 micron) because of laser heating. In this paper, a 3D COMSOL model of a silicon wafer that is heated using a laser moving radially across the wafer surface is implemented. In "Community" go to "model exchange. The laser is comming out of a fiber thus with a tophat profile (not gaussian). Nov 6, 2018 · I want to use the PDE interface in Equation Based Modeling to do it from 'scratch'. One is a single pulse induced transient peak-temperature, which is up to ~1635oC on both Si and glass substrates. Assuming good thermal insulation from the environment, the only source of heat loss is from the top surface via radiation to the processing chamber walls, which are assumed to be at a fixed temperature of 20 ° C. Mar 30, 2016 · The process of heating the surface of a material to the gaseous state and quickly removing the gas from the vicinity of the solid is often called ablation. アプリケーションのモデリングに必要な comsol ® 製品の組み合わせは, 境界条件, 材料特性, フィジックスインターフェース, パーツライブラリなど, いくつかの要因によって異なります. Actually, i created a metal sheet in form of a rectangle with solder in form of a circular segment on it. ch - amirh. I only have the basic Multiphysics module so will extra modules be required to solve my problem? Thanks in advance. The following model demonstrates the usage of the Radiative Beam in Absorbing Media interface for computing the heating of semitransparent materials. Nous supposerons avoir à notre disposition un laser de 40 W et de longueur d’onde 700 nm, et que le faisceau possède un profil gaussien d’écart type 1. But when i change the parameter of the laser-beam-radius to something like 50µm (focus diameter of the laser im using for the expirment is 100µm), the T_max and T_min values are completely useless (see screenshot). 1 版本授权。 所有商标均为其各自所有者的财产。 Mar 26, 2015 · I am trying to model the laser heating of silicon using a picosecond pulsed laser but have been encountering some problems that I can't seem to solve. This keeps the model quite simple, and suitable when the material is opaque at the wavelength in question. The gaussian distribution seems to be a reasonable way to represent Maxwell's equations for a laser. For this purpose, Heat Conduction with a Localized Heat Source on a Disk (Application ID: 17307) was used (see figure 1) for which Heat Transfer Module 子奇 陈 2024-10-25 COMSOL 员工. ghadimi@ The laser is on for 75 ms and then off for 25 ms, or the laser uses pulsed heating with a 75 percent duty cycle and 100 ms period. The transient thermal response of the wafer is shown. Let’s learn more! the specific heat at constant pressure. Surface heating and volumetric heating approaches are presented, along with a brief overview of the heat transfer modeling capabilities. Can anyone suggest to me the right way? Thank you very much Jan 10, 2012 · The laser beam will be able penetrate the sphere and provide heating at certain depths and not just heating the surface of the sphere. COMSOL Multiphysics ® 建模所需的 COMSOL ® 产品组合取决于多种因素，包括边界条件、材料属性、物理场接口及零件库，等等。 不同模块可能具有相同的特定功能，详情可以查阅 技术规格表 ，推荐您通过免费的试用许可证来确定满足您的建模需求的正确产品组合。 interaction of laser with the material described in COMSOL blog [3]. PDT Heat Transfer & Phase Change, Modeling Tools & Definitions, Parameters, Variables, & Functions Version 4. In that approach, you only solve the heat transfer equation, subject to the assumed thermal load. May 1, 2011 · Hi, I am new to Comsol. In addition, the wafer itself is rotated on its stage. Jul 28, 2023 · The general trend the peak surface temperatures during each laser pulse has some odd spikes. I used the laser_heating_wafer. ghadimi@epfl. It would be infinitely helpful if I could find the COMSOL mph file associated with the tutorial (laser_heat_transientCW. The energy distribution deposited on the surface by the laser is assumed Gaussian. A 2-inch silicon wafer, as shown in Figure 1, is heated for one minute by a 10 W laser that moves back and forth, while the wafer rotates on its stage. In the original laser heating wafer tutorial, the expression for the heat flux is p_laser[1/W]*gp1(x-wv1(t))*gp1(y) under the Analytic section. In terms of dimensions, the laser beam is larger than the spherical structure. Jul 14, 2021 · Hello, I am simulating the heating of a copper foil by x-ray laser pulses of 50 fs duration spaced by 444 ns. 2 0 Replies Aug 3, 2020 · KNOWLEDGE BASE Solving electromagnetic heating models with high-frequency loads; FORUM Thermal stresses in Al2O3 cylinder due to laser heating; BLOG Studying Laser-Material Interaction with Multiphysics Modeling; BLOG Modeling Thermally Induced Focal Shift in High-Powered Laser Systems; FORUM Glass rod deformation by an external force A 2-inch silicon wafer, as shown in Figure 1, is heated for one minute by a 10 W laser that moves back and forth, while the wafer rotates on its stage. I am the very new user who started using comsol few days ago. The Laser Heating interface is used to model electromagnetic heating for systems and devices where the electric field amplitude varies slowly on a wavelength scale. This effect occurs when laser heating 2 | LASER HEATING OF A SILICON WAFER Introduction A silicon wafer is heated up by a laser that moves radially in and out over time while the wafer itself rotates on its stage. Background: The pulsed nansecond laser (simplified as a surface heat source) is applied to a thin plate. Under certain assumptions, these phenomena can be modeled using a diffusive approximation in the COMSOL Multiphysics ® software. The incident heat flux from the laser is modeled as a spatially distributed heat source on the surface. Numerical simulation of laser heating is a very important approach to understand the Jul 9, 2012 · In the search window (magnifying glass) type laser. mph model as a guideline. COMSOL Multiphysics ® 建模所需的 COMSOL ® 产品组合取决于多种因素，包括边界条件、材料属性、物理场接口及零件库，等等。 不同模块可能具有相同的特定功能，详情可以查阅 技术规格表 ，推荐您通过免费的试用许可证来确定满足您的建模需求的正确产品组合。 2 | 硅晶片激光加热 简介 硅晶片在工作台上旋转，通过一束激光沿硅晶片的径向前后移动来对其加热。将激光 的入射热通量模拟为晶片表面分布的热源，可得到晶片的瞬态热响应。 To this aim, a 2D-axisymmetric time dependent model is developed. By modelling the incident heat flux from the laser as a spatially distributed heat source on the surface, the transient thermal response of the wafer is obtained. This multiphysics interface adds an Electromagnetic Waves, Beam Envelopes interface and a Heat Transfer in Solids interface. See Electromagnetic Heating in the COMSOL Multiphysics Reference Manual for a description of this multiphysics coupling in the context of Joule heating and laser heating modeling. I mean, when I introduce the gp1(x-v*t)*400[W] in the power option, the material does not reach the expected temperature; and I think that it is related with the definition, my model is a 2D model and the power is divided by an area and I dont know what's the 2 | LASER HEATING OF A SILICON WAFER Introduction A silicon wafer is heated up by a laser that moves radially in and out over time while the wafer itself rotates on its stage. 4 0 Replies CM Basheer Feb 16, 2017 · I am trying to simulate a system with N2+SF6 gas flow under laser irradiation. Ablation requires a large heat flux to be delivered to the surface of the material. Apr 5, 2010 · As I am new to Comsol, I have problems to simulate the temperature rising of the plasmonic structure during the laser illumination. These perturbations, in turn, can change the way the laser propagates. The threshold laser power for E7 liquid crystal phase transition2 at 57 C appears as a dark Nanoparticles are being extensively researched as a noninvasive method for selectively targeting and killing cancer cells. I am using heat transfer module with phase change, because I want to take into account the latent heat of melting of my material. The heat source is a continuous wave laser having gaussian profile. This modeling approach has applications in laser heating of living tissue as well as materials processing. Laser pulse train heating of Sol-Gel film has been experimentally investigated in our group. To minimize the temperature variation over the wafer during the heating process, we want to turn the laser off periodically, while the heat source is in the center of the wafer. Use of COMSOL Multiphysics . Dec 12, 2022 · A similar modeling scenario is featured in our Laser Heating of a Silicon Wafer tutorial model, but let’s keep in mind that the lessons discussed here are applicable to any case involving transient heating. In the latest version of COMSOL (5. èIR-PULSED LASER MICROSHAPING While the simple approach of slow annealing was first used to mitigate FIGURE 2. Nov 18, 2014 · In high-powered laser focusing systems, a medium such as a glass lens may absorb enough energy from the laser to heat up significantly, resulting in thermal deformation and changing the material’s refractive index. SF6 can be considered as an absorbent for laser ray due to its molecular size. The tutorial forms part of a video environment using Comsol Multiphysics 4. 0 版本授权。 所有商标均为其各自所有者的财产。 Dec 12, 2022 · A similar modeling scenario is featured in our Laser Heating of a Silicon Wafer tutorial model, but let’s keep in mind that the lessons discussed here are applicable to any case involving transient heating. I can successfully formulate the heating effect at each layer. In the case model above, the formula used for the nonlinear absorption coefficient with temperature is a linear variation model, meaning that the absorption rate varies linearly and linearly with temperature, which in turn leads to a nonlinear phenomenon in the variation of the absorption rate and the final heat transfer field. " In the search window (magnifying glass) type laser. Use a Waveform function and a set of variables to define the Gaussian distribution of the laser heat load around the focal point, as it moves back-and-forth Apr 9, 2021 · In this video, you learn how to model a moving laser heat source (pulsed and continuous wave mode) in COMSOL Multiphysics. Use the Electromagnetic Heating multiphysics coupling to account for electromagnetic volumetric and surface losses in the heat equation. I am following the tutorial on Comsol 3. Experimental validation of COMSOL FE model of light valve laser heating. Specifically, the model analyzes how a Gaussian profile laser beam heats two different semitransparent materials deposited onto a silicon wafer. Assuming also that the laser is operating at a wavelength at which the wafer is opaque, no light is passing through the wafer. This multiphysics interface adds an Electromagnetic Waves, Beam Envelopes interface and a Heat Transfer in Solids interface. In this study, we model the thermal activation of gold nanospheres and nanorods in a fluidic environment to determine the thermal response of the surrounding medium. The heat load due to the laser is thus multiplied by the emissivity. Close to the top of the listing is a simulation of the laser as a moving heat source. I am doing what you say an the behaviour is correct but the heating is not enought. The frontside of the plate is subjected to a rectangluar pulse flux source. Modeling the incident heat flux from the laser as a spatially distributed heat source on the surface, the transient thermal response of the wafer is obtained. Darüber hinaus wird der Wafer selbst auf seinem Tisch gedreht. Die transiente thermische Antwort des Wafers wird May 11, 2016 · Using COMSOL Multiphysics, the team was able to understand energy coupling and heat flow for a wide range of parameters, such as the duration of laser pulse (i. Jul 9, 2012 · In the search window (magnifying glass) type laser. , microseconds compared to minutes), and their results were in line with experimental observations. Oct 24, 2024 · This means that the incident light is both converted to thermal energy and redirected. Simulation results showing Marangoni flow of laser-heated glass. Results Figure 2. Jul 4, 2017 · To accurately model laser beam-matter interaction, there are several factors to account for: Laser radiation absorption; Conductive and convective heat transfer; Phase changes (melting and solidification as well as evaporation and condensation) Surface tension effects Jun 22, 2015 · In this blog post, we have looked at the various modeling techniques available in the COMSOL Multiphysics environment for modeling the laser heating of a solid material. Aug 11, 2014 · Therefore I want to simulate a block of material (160 mm long, 40 mm wide, 8 mm high), and a laser power of 450W, with a spotsize of 2. Le laser est allumé durant 75 ms et éteint durant 25 ms, correspondant à un chauffage pulsé de période 100 ms avec un rapport cyclique de 75 pour cent. Here, we will look at a Gaussian profile laser beam with periodically pulsed intensity, heating up two different semitransparent materials deposited onto a silicon substrate. But I do not know how to get residual stress. Apr 9, 2021 · In this video, you learn how to model a moving laser heat source (pulsed and continuous wave mode) in COMSOL Multiphysics. Firstly the model: I have a 3D rectangular geometry for the silicon, and a 40 um diameter circular beam incident upon the top surface. To model this, we will solve a multiphysics modeling problem using the temperature field and the Beer–Lambert law. Jul 5, 2009 · Basically I'd like to take this energy that COMSOL calculates the particle to have absorbed into the Heat Transfer toolbox, and calculate the heating of the nanoparticle this corresponds to, and how this heat diffuses into a surrounding medium. Feb 29, 2016 · Modelling laser heating and penetration through materials. %PDF-1. The simplest way is considering laser as the heat dissipated either as point source or as heat source with defined radius. According to the suggestion from the Comsol support, one heat source was added using the total power loss of the electromagnetic wave. e. Ein Silizium-Wafer wird von einem Laser erhitzt, der sich im Laufe der Zeit radial nach innen und außen bewegt. 0 版本中创建 此模型基于《 COMSOL 软件许可协议》6. 0 版本授权。 所有商标均为其各自所有者的财产。 Nov 4, 2016 · I started my model taking inspiration from the laser_heating_Si wafer tutorial that is available online: I created a parallelepiped of material (thickness x width x length) and a heat source with a gaussian profile. my Problem is, the Temperature is almost steady along the path , for example 200°C [+5,-5], but in Reality the Temperature must increase along the path. A cylinder of material with a heat source over the top surface. 5 of "Heating with a Moving Laser" but I would prefer to learn this on Comsol 4. However, I got the problem during the meshing. I am trying to simulate the temperature rising of the plasmonic structure during the laser illumination. Jan 26, 2012 · Hi, I am new to Comsol and would like to simulate the temperature increase as a laser source illuminates a substrate. The Laser Heating Interface • Coupling Features Simulation of laser pulse-train (25ns, 60 kHz and 3000 pulses) heating Sol-Gel thin film using COMSOL Multiphysics software is investigated. The results show two kinds of temperatures formed on film surface by laser pulse-train heating. 1 版本中创建 此模型基于《 COMSOL 软件许可协议》6. 2 | LASER HEATING OF A SILICON WAFER Introduction A silicon wafer is heated up by a laser that moves radially in and out over time while the wafer itself rotates on its stage. 0a to determine the thermal response of the surrounding medium. . Mar 19, 2019 · Hey, im new to Comsol and i want to simulate laser-heating a plate. The laser heating simulation was conducted utilizing COMSOL Multiphysics and the outcomes were presented in a visual format representing the thermal distribution 2 | 硅晶片激光加热 简介 硅晶片在工作台上旋转，通过一束激光沿硅晶片的径向前后移动来对其加热。将激光 的入射热通量模拟为晶片表面分布的热源，可得到晶片的瞬态热响应。 A time-dependent COMSOL Multiphysics model of an additive manufacture process, which uses powder consolidation by laser heating was developed, providing a platform to better understanding the manufacture process & provide a tool to reduce resulting distortion & optimization of an additive manufacture process. To model the rotation of the wafer, use the Moving Mesh > Rotating Domain feature. The thermal inward heat flux is formulated as: −𝒏∙(−𝑘∇𝑇)=𝑃 𝑎 ∙ 𝐴0 @ 0 2 A 2∙ − 2 @ 0 2 A 2 where 𝑃 𝑎 is the peak laser power, 𝐴0 Oct 22, 2018 · And use this laser power function to heat the wafer. The tutorial forms part of a video wavelength of the laser, it is assumed that absorptivity equals emissivity. The peak, average, and minimum temperature during the heating process is computed, as well as the temperature variations across the See full list on comsol. I started from the laser heating tutorial (silicon wafer). 1), there is a function for laser that is 'beam depositor', Shall we need to define heat flux along with for laser heating or that beam depositor itself is enough to define laser source. Therefore i use the heat transfer branch. for example at the beginning 200°C and after 80 mm 350°C or higher. Simulation of laser pulse-train (25ns, 60 kHz and 3000 pulses) heating Sol-Gel thin film using COMSOL Multiphysics software is investigated. 7 mm, moving at a speed of 100 mm/min. 在 COMSOL Multiphysics 6. • The laser beam also moves over the surface at a given speed along a prescribed path. Glass slab Heat flux = h(T ext - T) The laser beam heat source is modeled as a heat source moving across the surface of the spinning wafer. 2. Jul 9, 2021 · Laser welding of two dissimilar materials (AISI 316L and Ti6Al4V) of 2 mm thickness has been considered while modeling in COMSOL multiphysics with a coupling of heat transfer and solid mechanics 2 | LASER HEATING OF A SILICON WAFER Introduction A silicon wafer is heated up by a laser that moves radially in and out over time while the wafer itself rotates on its stage. In addition, the wafer itself is rotated on its stage. This type of stepped loading in time is addressed via the Events interface , which is used to introduce a Discrete State variable, ONOFF , that is either 0 or 1 in time. The peak, average, and minimum temperature during the heating process is computed, as well as the temperature variations across the materials laser absorption coefficients and turbulent coolant flow physics are critical to derive realistic estimates of the light valve laser heating. The thermal activation of the AuNP and the thermal response of the medium can be modeled using Comsol’s Heat Transfer Module. Oct 3, 2013 · Note that while COMSOL employees may participate in the discussion forum, COMSOL ® software users who are on-subscription should submit their questions via the Support Center for a more comprehensive response from the Technical Support team. 5 mm. eu, through google, or anywhere. Laser pulse-train heating offers an alternative method, because of it’s unique function in combining the CW and the pulsed laser heating. Numerical simulation of laser heating is a very important approach to understand the Nov 4, 2016 · I started my model taking inspiration from the laser_heating_Si wafer tutorial that is available online: I created a parallelepiped of material (thickness x width x length) and a heat source with a gaussian profile. Posted Feb 29, 2016, 7:21 a. In this paper, we simulate and experimentally verify the heat effects on different materials excited by a recycled and portable continuous wave 635 nm semiconductor laser diode module. Der einfallende Wärmestrom des Lasers wird als eine räumlich verteilte Wärmequelle auf der Oberfläche modelliert. The temperature distribution is computed in the component using the Heat Transfer Module in COMSOL Multiphysics®. m. 2. Jul 9, 2012 · What may help: go to "Community" on the COMSOL website. The pulse duration is a few nanoseconds, wheras the pulse repetition The Laser Heating interface is used to model electromagnetic heating for systems and devices where the electric field amplitude varies slowly on a wavelength scale. com, COMSOL. Therefore, all of the laser heat is deposited at the surface. Here, we have highlighted how the General Form PDE interface, available in the core COMSOL Multiphysics package, can be used for implementing the Beer-Lambert law to model the heating of a semitransparent medium with temperature-dependent absorptivity. 6 %âãÏÓ 383 0 obj > endobj xref 383 62 0000000016 00000 n 0000002398 00000 n 0000002647 00000 n 0000002674 00000 n 0000002724 00000 n 0000002778 00000 n 0000002827 00000 n 0000002867 00000 n 0000003101 00000 n 0000003208 00000 n 0000003287 00000 n 0000003364 00000 n 0000003442 00000 n 0000003520 00000 n 0000003598 00000 n 0000003676 00000 n 0000003754 00000 n 0000003832 00000 n Feb 17, 2017 · -The laser beam heats the volume then it is reflected by the mirror I modeled the heat transfer by using the heat equation and the heat source is calculated thanks to the beer's law (by using a general form PDE) but I don't know how to model the reflection of the silicon so the heat source is lower as it should be. The Laser Heating () interface is used to model electromagnetic heating for systems and devices where the electric field amplitude varies slowly on a wavelength scale. heat within pulse duration. mph), but I am completely unable to find it on COMSOL. I tried replacing the p_laser with a gaussian function with an argument t, “gp2(t)*gp1(x-wv1(t))*gp1(y)”, however when I plot it, it plots over x Feb 16, 2015 · The laser heat source itself traverses back and forth over the wafer with a period of 10 seconds along the centerline. 𝑎 The energy deposition is assumed to be Gaussian and is modelled by a boundary heat flux, as presented in Figure 1. Presented by:Amir Ghadimi: amir. Sep 28, 2012 · Hi all, I have a problem in relation with this. ) May 12, 2016 · Hello to all of you, i want to implement soldering by laser in a 2D environment. Jun 19, 2013 · Hi, I am Trying to simulate a Laser heating of block of steel, the laser moves in a 80 mm straight path. To approximate this, I am defining a large disk/cylinder with ambient temperature boundaries and in the centre of that disk a smaller cylinder which region is referred to the focal spot. Aug 16, 2015 · Laser heating Posted Aug 16, 2015, 8:57 p. ただし, 反射があるため, 慎重に検討する必要があるニュアンスがいくつかあります. Aug 25, 2020 · Frequently laser heating is modeled by solving the heat transfer equation under the assumption of a heat source profile applied to the surface. Apr 12, 2020 · Hi, I'm trying to make a model of laser heating a very thin plate of Al, and have resorted to a swept mesh to even get the mesh down, as Comsol wont mesh it otherwise due to size. Apr 13, 2015 · Summary and Further Refinements. zwxi pvud jjxncrd oipkxs pntysb jwugqx mxyl jhf zza komlzv icoqe tfa bganyeu lybumvr hwzf