[CFD] H/A (HbyA) in OpenFOAM - Part 2

[@jerryf2091]

Thank you so much for the excellent explanations. They were both in-depth and clear. I would be thrilled to see a series of episodes on this channel that explain the different types of boundary conditions used in OpenFOAM. I've always been curious about how the code handles boundary conditions and integrates them with the solver. Thanks again, and I'm looking forward to more great content from this channel.

[@ucanhvan4557]

As a PhD student in the CFD field, I cannot deny that it is the best video ever to explain PhiHbyA in OpenFoam! Thank you so much, Dr.

[@abhijeetsingh1306]

Hi, How should I start my CFD journey? Could you please help me out with. Like from beginner to advanced/master level understanding, Thanks

[@jacklee9235]

Great explaination! I can't wait to the Part3 for the left hand side of the pressure equation.

[@tonecukon91]

There is Part3? :O

[@hebanassar6096]

Thanks a lot Dr Aiden , could you please consider sharing a video weekly explaining openFoam more ?

[@antonshevelev5034]

Excellent!

[@LateinCecker]

Great explanation! However how would one go about implementing boundary conditions for H(u)/A since the face interpolate values of this vector field are also required for boundary faces during the computation of phiHbyA. In the case of no-slip boundaries with grad(p) = 0 we can safely assume (H(u)/A)_b = u_b. But for all boundaries where the pressure gradient is not zero, we must fulfill (H(u)/A)_b = u_b + (grad(p)/A)_b which is a problem since A_b is not defined. Any ideas how one would go about this?

[@fluidmechanics101]

Difficult! There is a good chapter on this topic in 'Notes on Computational Fluid Dynamics: General Principles'

[@LateinCecker]

@@fluidmechanics101 Thanks, i will definitly have a look at it 😊

[@jasonsum7441]

Hi Aiden, could you please consider sharing some theories about design optimization in CFD, like the Adjoint solver, Gradient-based approach, Morphing, Sensitivity Analysis etc. Thanks!

[@aravindpalaparthi4629]

Hi, I have a small doubt. a simple bus bar in 2 different scenarios. 1. Applied constant convection coefficient on busbar surface. There is no air domain 2. Applied constant convection coefficient on busbar surface. There is air domain. My query is can we apply constant htc when there is fluid flow(with air domain)? Becuase applying a htc of 5 as B.C represents there is very less air flow. If both are same, im getting different temperature plots and maps. What would be the difference between 1st case and 2nd case,

[@abhijeetsingh1306]

What's the best approach to start CFD? I am having trouble searching for the correct resources? Any ideas/advice please !