Numerical solving convection-diffusion problem

[Yinxiao Li]

Hi everyone,
I need to solve a convection-diffusion problem and I wonder what is the best software for numerically solving such a problem. I prefer to solve it with a software since my problem of interest is a 3D problem and it will be hard for me to solve it analytically. Is there any recommendations? I have used Comsol but I don't think the result is that accurate.

In details, the problem is as follows:
I have some dilute particles such as water vapor that needs to be removed. There is a small source where the concentration of this particle is fixed. I also have a strong nitrogen flow to help remove this particle. Briefly, I need to know how efficiently this particle can be removed, by diffusion (due to the concentration difference) and by convection (nitrogen flow).

 

[Achy47]

Thank you for your question regarding the best software for solving a convection-diffusion problem. As a scientist with experience in numerical methods for solving such problems, I would like to offer some recommendations.

Firstly, it is important to note that the accuracy of numerical solutions depends not only on the software used, but also on the user's understanding of the problem and the numerical methods being applied. Therefore, it is crucial to have a good understanding of the problem and to carefully choose the appropriate numerical methods for your specific case.

That being said, there are several software options that can effectively solve convection-diffusion problems. Some popular choices include ANSYS Fluent, OpenFOAM, and Autodesk CFD. These software packages have a range of capabilities and can handle both 2D and 3D problems.

In terms of accuracy, it is important to carefully set up the problem and choose appropriate meshing and solver settings. This can greatly affect the accuracy of the results. Additionally, it may be helpful to validate your results against analytical solutions or experimental data, if available.

In your specific case, it seems like the problem involves both diffusion and convection, with a fixed concentration source and a strong nitrogen flow. Therefore, it may be helpful to consider using a software that has good capabilities for both diffusion and convection, such as ANSYS Fluent. However, as mentioned before, the accuracy of the results will also depend on your understanding of the problem and the numerical methods being used.

I hope this helps in your decision-making process. Best of luck with your research.