What is laser heating?

What is laser heating?

In a laser heating process, energy is stored in the substrate during the heating cycle through internal energy gain of the substrate material and the stored energy is removed during the cooling cycle of the process.

How do I add a heat source in Comsol?

Click the General source (the default), Linear source, or Heat rate buttons. For General source enter a value for the distributed heat source Q0 when the default option (User defined) is selected. See also Additional General Source Options to use predefined heat sources available from other interfaces.

What is thermal insulation in Comsol?

Thermal Insulation. This node is the default boundary condition for all Heat Transfer interfaces. This boundary condition means that there is no heat flux across the boundary: and hence specifies where the domain is well insulated.

How do you plot a temperature distribution in Comsol?

Then you can do as follows:

1. Results: Add a 1D Plot Group.
2. 1D Plot Group: Add a Point Graph.
3. Select the point that you are interested in.
4. Enter the expression to plot in the Expression section.
5. Click on Plot in the settings window’s toolbar.

What are the merits of laser heating?

Laser radiation provides the most suitable choice for the purpose of heating the material during microforming process as it offers several advantages in comparison to other methods, including [35]: (1) the laser energy input and thus the resulting temperature in the workpiece can be easily controlled via the current of …

How do lasers produce heat?

When lasers are used to heat most materials, the energy from the laser first heats up the electrons in the target. These in turn heat up the ions, making the process slower than targeting the ions directly.

What is heat transfer module?

The Heat Transfer Module is used by product designers, developers, and scientists who use detailed geometric models to study the influence of heating and cooling in devices and processes. It contains modeling tools for the simulation of all mechanisms of heat transfer including conduction, convection, and radiation.

Which is better ANSYS vs COMSOL?

Both provide the ability to accurately solve multiphysics phenomena, however, the programme used depends on the aim. If you want to use generic physics models and save time, I recommend ANSYS, and if you want the best access to the physics and equations regardless of time, I recommend COMSOL.

Why neoprene is a good thermal insulator?

Why does foamed neoprene offer such good thermal insulation? Foamed neoprene contains small bubbles of nitrogen gas. The presence of such a gas with a very low thermal conductivity reduces heat transfer by almost an order of magnitude, compared to having the skin directly in contact with water.

How insulating is neoprene?

Neoprene’s burn point is around 260 °C (500 °F). In its native state, neoprene is a very pliable rubber-like material with insulating properties similar to rubber or other solid plastics. Neoprene foam is used in many applications and is produced in either closed-cell or open-cell form.

What is the temperature profile?

A temperature profile is how temperature of something changes as a function of distance. In atmospheric sciences, the temperature profile of the atmosphere is how the temperature of the atmosphere changes as a function of altitude above sea level.

How do I get a temp profile?

2. Temperature profile of a plane wall : calculation procedure

1. STEP 1 : make an assumption on the wall temperature on 1 side.
2. STEP 2 : estimate the temperature profile layer by layer.
3. STEP 3 : calculate the overall heat transfer coefficient.
4. STEP 4 : Calculate the heat flux.

How do lasers work?

A laser is created when electrons in the atoms in optical materials like glass, crystal, or gas absorb the energy from an electrical current or a light. That extra energy “excites” the electrons enough to move from a lower-energy orbit to a higher-energy orbit around the atom’s nucleus.

Does laser have heat?

Lasers usually heat things up. They are good at doing this because of how tightly packed the energy in a laser beam is. To put it in perspective, the average person probably puts out about 250 Watts while running.

What are the modules in Comsol?

The COMSOL Product Suite Add-on modules provide specialized functionality for electromagnetics, structural mechanics, acoustics, fluid flow, heat transfer, and chemical engineering. Interfacing products are available for CAD and other third-party software.

Is COMSOL a programming language?

COMSOL Multiphysics is a cross-platform finite element analysis, solver and multiphysics simulation software. It allows conventional physics-based user interfaces and coupled systems of partial differential equations (PDEs).

How to set up surface heat load in COMSOL Multiphysics?

This is most easily done with the Deposited Beam Power feature (shown below), which is available with the Heat Transfer Module as of COMSOL Multiphysics version 5.1. 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.

How does a laser heat up a silicon wafer?

A silicon wafer is heated up by a laser that moves radially in and out over time. In addition, the wafer itself is rotated on its stage. The incident heat flux from the laser is modeled as a spatially distributed heat source on the surface. The transient thermal response of the wafer is shown.

Can I use a laser as a surface heat source?

Surface Heat Sources. In cases where the material is opaque, or very nearly so, at the laser wavelength, it is appropriate to treat the laser as a surface heat source. This is most easily done with the Deposited Beam Power feature (shown below), which is available with the Heat Transfer Module as of COMSOL Multiphysics version 5.1.

How do I model two crossed laser beams in heat transfer?

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. The Deposited Beam Power feature in the Heat Transfer Module is used to model two crossed laser beams. The resultant surface heat source is shown.