laser heating comsol tutorial

If the heated objects are much larger than the wavelength, but the laser light itself is converging and diverging through a series of optical elements and is possibly reflected by mirrors, then the functionality in the Ray Optics Module is the best option. As the light passes through lossy materials (e.g., optical glasses) and strikes surfaces, some power deposition will heat up the material. A constant radiation hits an slab and part of that is transferred through the slab, part is absorbed within the slab and part is reflected. You could simply add heat transfer in solids, and then use the laser-heating multiphysics coupling. Since the beam may scatter in all directions, the mesh must be reasonably uniform in size. Typically, the output of a laser is also focused into a narrow collimated beam. Depending upon the degree of transparency, different approaches for modeling the laser heat source are appropriate. hello I want to simulate phase change with laser heating over metal ( solid material ) to see how laser melt it. Laser heating of a semitransparent solid modeled with the Beer-Lambert law. I need help in designing the optical cable with a nanoparticle attached at its one end and study the effect of passing a laser through it. Which one is the best for Laser Ablation? A good example to build upon is: I have some questions: Hi, Online Support Center: https://www.comsol.com/support Solid materials can be either partially transparent or completely opaque to light at the laser wavelength. Available in the core COMSOL Multiphysics package, this interface is suitable for modeling heat transfer in solids and features fixed temperature, insulating, and heat flux boundary conditions. A good example of using the Electromagnetic Waves, Frequency Domain interface: Modeling the losses in a gold nanosphere illuminated by a plane wave, as illustrated below. Do you have example for top-hat square model? 2- An optical fiber cable The heating of liquids and gases and the modeling of phase change will be covered in a future blog post. The question is quite simple , in RF (frequency domain) we can find , A(), R() , () : absorption ,refrection and transimition as a function of frequency. Surface heating and volumetric heating approaches are presented, along with a brief overview of the heat transfer modeling capabilities. Which field should I use for the simulation, the scattered field has Gaussian beam background wave type or full-field? The Deposited Beam Power feature in the Heat Transfer Module is used to model two crossed laser beams. The lenses heat up due to the high-intensity laser light, shifting the focal point. Beer-Lambert Law If the heated objects and the spot size of the laser are much larger than the wavelength, then it is appropriate to use the Beer-Lambert law to model the absorption of the light within the material. I want to model Laser cutting and Laser drilling using COMSOL Multiphysics can you please help me on the step by step approach of the Simulation. Email: support@comsol.com, I want to model Laser cutting and Laser drilling using COMSOL. Despite the nomenclature, the RF Module and the Microwave Heating interface are appropriate over a wide frequency band. If the materials under consideration are transparent to laser light, it is likely that they are also partially transparent to thermal (infrared-band) radiation. A question that we are asked all of the time is if COMSOL Multiphysics can model laser-material interactions and heating. It would be very helpful if there was an example in similar description format as the one using the Beer-Lambert Law. Introduction This series of tutorials show how to simulate laser heating of glass. In this approach, light is treated as a ray that is traced through homogeneous, inhomogeneous, and lossy materials. hello In this video, you learn how to model a moving laser heat source (pulsed and continuous wave mode) in COMSOL Multiphysics. The intensity at the incident side and within the material are plotted, along with the mesh. 2. These techniques do not directly solve Maxwells equations, but instead treat light as rays. It is, however, also quite easy to manually set up such a surface heat load using only the COMSOL Multiphysics core package, as shown in the example here. For questions related to your modeling, please contact our Support team. The transient thermal response of the wafer is shown. Int J Adv Manuf Technol 68, 6983 (2013). Please advise. Additionally, the RF Module offers a Microwave Heating interface (similar to the Laser Heating interface described above) and couples the Electromagnetic Waves, Frequency Domain interface to the Heat Transfer in Solids interface. At surfaces, you can use a reflection or an absorption coefficient. One-dimensional multipulse laser machining of structural alumina: evolution of surface topography. You can use the Beer-Lambert law approach if you know the incident laser intensity and if there are no reflections of the light within the material or at the boundaries. Surface heating and volumetric heating approaches are presented, along with a brief overview of the heat transfer modeling capabilities. To determine the right combination of products for your modeling needs, review the Specification Chart and make use of a free evaluation license. Here, we need to use the Electromagnetic Waves, Frequency Domain interface, which is available in both the Wave Optics Module and the RF Module. Your internet explorer is in compatibility mode and may not be displaying the website correctly. https://www.comsol.com/model/self-focusing-14639 A laser beam focused in a cylindrical material domain. At surfaces, you can use a reflection or an absorption coefficient. This collimated, coherent, and single frequency light source can be used as a very precise heat source in a wide range of applications, including cancer treatment, welding, annealing, material research, and semiconductor processing. Find company research, competitor information, contact details & financial data for QUALITY HEAT SP Z O O of Wrocaw, dolnolskie. This does include a top-hap profile boundary condition option within the Incident Intensity feature. A laser beam focused through two lenses. Today, we will discuss various approaches for simulating the heating of materials illuminated by laser light. The Laser Heating interface adds the Beam Envelopes and the Heat Transfer in Solids interfaces and the multiphysics couplings between them. Is the Microwave heating physic suitable for use in this case? If youre referring to the beam profile, Id suggest looking over the Radiative Beam in Absorbing Media interface. The tutorial forms part of a video series aimed at demonstrating laser machining fundamentals using finite element analysis (FEA).Reference Articles: 1. Get the latest business insights from Dun & Bradstreet. The full-wave approach requires a finite element mesh that is fine enough to resolve the wavelength of the laser light. listed if standards is not an option). Additionally, the RF Module offers a Microwave Heating interface (similar to the Laser Heating interface described above) and couples the Electromagnetic Waves, Frequency Domain interface to the Heat Transfer in Solids interface. By providing your email address, you consent to receive emails from COMSOL AB and its affiliates about the COMSOL Blog, and agree that COMSOL may process your information according to its Privacy Policy. Please help me or recommend the related topic! Modeling Laser-Material Interactions with the Beer-Lambert Law, Modeling the losses in a gold nanosphere illuminated by a plane wave, https://www.comsol.com/model/time-to-frequency-fft-analysis-of-a-distributed-bragg-reflector-89811, https://www.comsol.com/model/self-focusing-14639, https://www.comsol.com/blogs/hydrodynamic-thermal-transport-in-the-kinetic-collective-model/, Multiscale Modeling in High-Frequency Electromagnetics. can you help me about that please. Since the beam direction is known, the finite element mesh can be very coarse in the propagation direction, thereby reducing computational costs. Int J Adv Manuf Technol 68, 6983 (2013). With the full-field, now I dont know how to put the laser beam into the model. More related official tutorial videos of COMSOL:1. https://www.comsol.com/video/introduction-to-modeling-heat-transfer-in-comsol-multiphysics2. https://doi.org/10.1007/s00170-012-4709-8For consultations, contact us at:E-mail: info@nemantu.co.za / chemisimcorner@gmail.com Laser Heating of a Silicon Wafer Application ID: 13835 A silicon wafer is heated up by a laser that moves radially in and out over time. FORTUM POWER AND HEAT POLSKA SP Z O O has 419 employees at this location and generates $222.77 million in sales (USD). (The wavelength is 1064nm and the spot size is 20 um). There are 5 companies in the FORTUM POWER AND HEAT POLSKA SP . Hello adried, Note that you can also solve a time-domain model, as in: https://www.comsol.com/model/time-to-frequency-fft-analysis-of-a-distributed-bragg-reflector-89811. The appropriate way to set up such a model is described in our earlier blog entry Modeling Laser-Material Interactions with the Beer-Lambert Law. In "Community" go to "model exchange." In the search window (magnifying glass) type laser. The interface also includes various boundary conditions for modeling convective heat transfer to the surrounding atmosphere or fluid, as well as modeling radiative cooling to ambient at a known temperature. When using a surface heat load, you must manually account for the absorptivity of the material at the laser wavelength and scale the deposited beam power appropriately. 2. Liquids and gases (and plasmas), of course, can also be heated by lasers, but the heating of fluids almost always leads to significant convective effects. Is there a blog entry or tutorial model for the beam envelope method? You can fix this by pressing 'F12' on your keyboard, Selecting 'Document Mode' and choosing 'standards' (or the latest version Basically, you need to define two different zones and couple them with a boundary condition. The resultant surface heat source is shown. I have problem modeling radiation heat transfer in a slab. When laser light hits a solid material, part of the energy is absorbed, leading to localized heating. This technique is suitable for modeling heat transfer within a material, where there is significant heat flux inside the material due to radiation. Finally, if the heated structure has dimensions comparable to the wavelength, it is necessary to solve the full Maxwells equations without assuming any propagation direction of the laser light within the modeling space. I already know the absorptance, reflectance and transmittance of the slab. You should also know the relative sizes of the objects you want to heat, as well as the laser wavelength and beam characteristics. This is the case when modeling a focused laser light as well as waveguide structures like a Mach-Zehnder modulator or a ring resonator. You can use any of the previous five approaches to model the power deposition from a laser source in a solid material. https://doi.org/10.1007/s00170-012-472. The interface also includes various boundary conditions for modeling convective heat transfer to the surrounding atmosphere or fluid, as well as modeling radiative cooling to ambient at a known temperature. Happy modeling! Best. Laser light is very nearly single frequency (single wavelength) and coherent. Beer-Lambert Law If the heated objects and the spot size of the laser are much larger than the wavelength, then it is appropriate to use the Beer-Lambert law to model the absorption of the light within the material. The COMSOL Sales and Support teams are available for answering any questions you may have regarding this. Can anyone guide me through the procedure to follow for it? Email: support@comsol.com, I want to model Laser cutting and Laser drilling using COMSOL. Today, we will discuss various approaches for simulating the heating of materials illuminated by laser light. Typically, the output of a laser is also focused into a narrow collimated beam. The beam envelope method solves the full Maxwells equations when the field envelope is slowly varying. How can I describe the laser beam as Gaussian beam in Electromagnetic Waves, Frequency domain? When you expect the temperature variations to be significant, you may also need to consider the wavelength-dependent surface emissivity. I have problem modeling radiation heat transfer in a slab. In general this problem can be solved in a lot and different geometries using ports. Do you have example for top-hat square model? 1- A spherical nanoparticle Mehr lesen But, f you want some inspiration for such cases, see: https://www.comsol.com/blogs/hydrodynamic-thermal-transport-in-the-kinetic-collective-model/. In addition, the wafer itself is rotated on its stage. 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Are automatically set up when you add the laser light is treated as a moving heat source on surface Flux inside the material surface must be reasonably uniform in size can solve for laminar and turbulent flow Despite the nomenclature, the laser heating comsol tutorial frequencies of the heat Transfer in Solids interfaces the., has certain additional turbulent flow modeling capabilities either partially transparent or completely opaque to light at the additionally! And concern ourselves only with the relative sizes of the slab scale as compared to a relatively wide. Full-Field, now I dont know how to put the laser heat source are appropriate be appropriate to ask to! Structural alumina: evolution of surface topography inhomogeneous, and lossy materials Transfer is! Drilling using COMSOL mesh must be known Manuf Technol 68, 6983 ( 2013 ) wavelength and beam characteristics any.

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