COMSOL Tutorial 13 | 2D Rotating machinery simulation | Simple mixer numerical modeling using COMSOL

[@bentou-x4h]

Thank you, Professor, for this effort and simple explanation. I have a question , I want to use a fan in a room to exhaust air to another room what are the steps to follow to apply to COMSOL

[@LearnwithSAI]

Thank you for your kind words! To simulate a fan exhausting air from one room to another in COMSOL, you can follow these steps: Geometry Setup: Create the geometry for the two rooms and the connecting fan area. You can use simple 3D boxes for the rooms and a cylinder or opening for the fan. Physics Selection: Use the 'Laminar Flow' or 'Turbulent Flow' module, depending on the nature of the flow, to simulate air movement. Fan Definition: In COMSOL, you can use a 'Fan' boundary condition if you're modeling the fan explicitly, or you can define a velocity at the fan inlet/outlet. Alternatively, apply a pressure boundary condition at the outlet of the fan to simulate the pressure difference driving the flow. Inlet and Outlet: Set the inlet of the first room as an inflow boundary condition, where the air enters. At the outlet (the second room), set a pressure boundary condition or outflow condition at zero gauge pressure. Mesh Generation: Create an appropriate mesh for the geometry. Make sure to refine the mesh near the fan for better accuracy. Study and Solver: Choose a time-dependent study if the flow is transient, or a stationary study if it’s steady-state. Run the simulation to analyze the airflow patterns and exhaust performance. Let me know if you need more detailed guidance on any specific part of the process!

[@lihengwang6512]

Great video, gave me a lot of guidance and inspiration. I have a question, why do you need the small circle in the middle? Is it possible to do such a simulation using only the big circle and the impeller?

[@LearnwithSAI]

Thank you for the positive feedback! I'm glad the video was helpful. Regarding your question, the small circle in the middle typically represents a part of the geometry such as a hub or support structure that interacts with the fluid or affects the motion of the impeller. It's there to provide a more realistic simulation of the system. Yes, you can perform the simulation using only the big circle and the impeller, but the results might be slightly different as the smaller circle plays a role in how the flow interacts with the impeller. If you’re focusing on a simplified model or just the impeller’s behavior, you can try removing it and see how the results differ based on your simulation goals. Hope this helps, and feel free to ask if you have more questions!

[@gioespoo]

Hiii ... very nice video! Is it possible to do something like that but with a level set (Water and Air), where the water has an inlet with a velocity and an outlet ?

[@LearnwithSAI]

Thanks. Yes, I believe it is possible.

[@gioespoo]

@@LearnwithSAI I'm trying , but I have a problem. Could I contact you ? I think you can help me

[@johnpapa85]

@@gioespoo did you manage to do the simulation with the level set? I am trying to do it in 2d in a CSTR.

[@aliumara1205]

thank you so much for your nice video, can I have a question please?

[@LearnwithSAI]

Yes, please!

[@aliumara1205]

@@LearnwithSAI I have problem with magnetic nano partilcs attraction with external magnetic I don't how can simulated that

[@LearnwithSAI]

@@aliumara1205 I would recommend you to use the magnetic force option in the particle tracing module

[@aliumara1205]

@@LearnwithSAI thank you for answer, how it can attract with external magnetic fields?

[@aminanaima811]

Hi i need simulation of magnetic couplings synchronous how i do design of magnetic couplings synchronous in comsol multiphysics software version 5.6?

[@LearnwithSAI]

Sorry, I have no experience of simulating magnetic problems. It would be nice to try it. Can you share your problem statement?

[@muddaserahmed3652]

im getting problem in this domain where the error is saying that the last step is not conserved can you help me to sort it out

[@LearnwithSAI]

Please check mesh and boundary conditions.

[@daniyarbossinov5951]

Can you rotate blade by fluid pressure?

[@muddaserahmed3652]

i also working on project where blade is rotates through fluid

[@daniyarbossinov5951]

@@muddaserahmed3652 do you have results? Which software do you use?

[@muddaserahmed3652]

But i got errors

[@muddaserahmed3652]

I use comsol for CFD

[@LearnwithSAI]

Yes, the blades can be rotated with fluid pressure with FSI modelling.

[@aminanaima811]

Please Can you do design of magnetic couplings synchronous and asynchronous

[@LearnwithSAI]

Will try soon.

[@aminanaima811]

@@LearnwithSAI i hope so, thank you

[@shourovroy73]

hello sir how can i contact you?

[@LearnwithSAI]

Thank you for your interest! Currently, I provide guidance and support through comments and video tutorials. Feel free to ask any questions here, and I’ll do my best to assist you with any COMSOL-related queries!

[@jhonycheema2869]

@LearnwithSAI Hi sir, I need tutorial on how to simulate a propeller fan in comsol 3d, and is there any chance to contact you privately, that would be great?