COMSOL: Simulation of liquid nitrogen cooling (Help please)

In summary, a 10x10x0.5 mm InSb sample is attached to a cooled copper table with silver glue, while liquid nitrogen passes through the table. The sample is exposed to a beam of electrons, causing the surface to heat up at a temperature of 300 K and a pressure of 1 bar. The COMSOL modules used for simulations include heat transfer in solids, laminar flow, and multyphysics. However, it is not possible to calculate the heating during cooling. A nitrogen dynamic viscosity of 161,4 E-6 (Pa*s) is also mentioned. The conversation then moves on to simulations of heating with COMSOL, specifically for LN2, and it seems that the simulation was
  • #1
Engineer_Kosyakova
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TL;DR Summary
Simulation of electron beam heating (SEM) of an InSb sample with nitrogen cooling. It is not possible to calculate the heating during cooling in COMSOL. Maybe I'm using the wrong modules for cooling? Without cooling, the heating counts correctly.
The InSb sample (parameters 10x10x0.5 mm) is glued with silver glue to a cooled copper table. Liquid nitrogen passes through the table. While the model is at a temperature of 300 K and at a normal pressure of 1 bar. The sample is affected by a beam of electrons, which causes the surface to heat up. Modules used in COMSOL:
1. Heat transfer in Solids
2. Laminar Flow
3. Multyphysics (auto)
It is not possible to calculate the heating during cooling. Nitrogen Dynamic Viscosity - 161,4 E-6 (Pa*s)
comsol.png
 
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  • #3
Good afternoon! Yes, it seems that everything turned out on a more powerful computer.
 

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1. How does COMSOL simulate liquid nitrogen cooling?

COMSOL uses a multiphysics approach to simulate liquid nitrogen cooling, taking into account factors such as heat transfer, fluid flow, and phase change. It uses finite element analysis to solve the governing equations and provides a detailed visualization of the cooling process.

2. Can COMSOL accurately predict the cooling rate of liquid nitrogen?

Yes, COMSOL has been extensively validated and has shown to accurately predict the cooling rate of liquid nitrogen. However, the accuracy of the simulation depends on the accuracy of the input parameters and assumptions made.

3. What are the key parameters that need to be input for the simulation?

The key parameters for the simulation include the initial temperature of the liquid nitrogen, the surrounding temperature, the geometry of the cooling system, and the material properties of the components involved. Other factors such as flow rate, pressure, and insulation can also be included for a more detailed simulation.

4. Can COMSOL be used to optimize the design of a liquid nitrogen cooling system?

Yes, COMSOL can be used to optimize the design of a liquid nitrogen cooling system by allowing for the analysis of different design variations and their impact on the cooling rate. This can help in identifying the most efficient design for a given application.

5. Is COMSOL user-friendly for those without a background in simulation software?

While COMSOL does require some technical knowledge and training, it has a user-friendly interface and provides extensive documentation and support. Additionally, there are tutorials and webinars available to help users get started with the software.

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