Adaptive Mesh Refinement (AMR) | OpenFOAM

[@basaruoz7127]

Thank you, we really appreciate your effort, My question is
Can I use AMR for my 2D water entry problem by using overInterDyMFoam solver.
I mean when you work with overset mesh, maybe it will be difficult to use AMR.

[@LourencoSassetti]

Congratulations!
Maybe you could try a 4th option: the 25600 mesh with AMR. However, AMR of just 1 extra level, done only every 2 to 4 time-steps and setting the refinement for a larger region around the interface. That might be a good performance-efficiency compromise.

[@majedkaneo2782]

thank you very much

[@alexches1954]

When you give the results of three calculations, in the case of AMR, there is a problem of describing the vortex behind the bubble. In the first and second cases it is. I understand this is the choice of the adaptation parameter?

[@praveenkumarsharma5978]

Thanks for the explanation. I have done the same to check drop falling. I have downloaded your file and pated in the control directory to run the simulation. But mesh did not refine. I am using OpenFoam10. Let me know if you have any suggestions. Thanks.

[@antoine1407]

I am using this tutorial to simulate a shock wave impact on a water droplet, I made all steps you said but when I run my solver "compressibleInterFoam" it doesn't seem to work, do you know any possible reason?

[@Bunny-jf8xd]

In this case of blockmeshdict file you used the vof case blockmeshdict file or different one because in previous problem (vof) ncells is 24000 and in this video the ncells is 3200 .
i tried thid simulation with your previous case (vof) blockmeshdict file and it is taking too much time. please guide me on this

[@trongnguyenduy2209]

why is simulation with AMR techniques is much longer than the third one during its cell number seem much lower (3200 cells compared with 25600 cells)?

[@francootaola9172]

it is normal, AMR is quiet heavy duty in terms of resources, it is partially remeshing each time step, in the third one you mesh only one time. This is why, amr is really particular in your application. It is not something to use in all simulation as sometimes it will be better to refine the howl mesh

[@amirhosseinparvin2119]

Thank you. I want to know is it possible to do mesh refinements for two phases interfaces for multiphase calculation? like alpha.water and alpha.sed?

[@DDFluids]

I never tried this. But you can add one more field in same code and check.

[@trongnguyenduy2209]

is it possible to run AMR technique in parallel mode? I have tried but the simulation crashed.

[@fundamentalsofmechanicalen2168]

Have you any idea about? How can plot Skin Friction Coefficient Vs Reynold number graph with the help of gnuplot

[@DDFluids]

I will make a video on turbulent kinetic energy vv position graph in a diffuser. You can modify code as per your requirement.

[@fundamentalsofmechanicalen2168]

@@DDFluids please upload

[@fundamentalsofmechanicalen2168]

Please provided post processing result of any case and how to plot different graph with the help of gnuplot

[@DDFluids]

Sure. Thanks for suggestions.

[@NeelarunMukherjee]

Hey can you please make a video where I can use a steady solver to perform the AMR. Apparently, interFoam is a AMR modified solver inbuilt in OF.

[@DDFluids]

I think when you say steady solver, you mean standard solver. Am I correct? In that case ingerFoam is standard VoF multiphase solver.
If steady solver means steady-state solver, then I don't think it is a good idea to implement it. Because our final focus is on final iteration and the inbetween iteration are just for getting fully develop flow profile.

[@NeelarunMukherjee]

@@DDFluids Yes I mean steady state solver. I m wrking on rayleigh taylor instability and thus I need a steady state solver and to perfectly resolve the fingers, I may need a similar technique. What do you recommend?

[@jayabratadhar]

@@NeelarunMukherjee Rayleigh-Taylor instability is an unsteady (transient) system. You may ask if they can help regarding the use of AMR in single-phase systems. Even a time-varying wall velocity in a simple Lid-driven cavity flow would be a nice example to tackle.