Compressible

[cloner0101]

Hey guys
Im new to this website and i had question that is openlb support compressible flows ?
please give me a general details about how can i simulate that kind of flow …
Thanks

[mgaedtke]

Hey cloner,

at the moment, there isn’t any modell available for compressible flows in OpenLB.

What setup do you want to simulate? Do you have a specific compressible LBM in mind?

If you have questions regarding the implementation, feel free to ask 🙂
Best Regards, Max

[cloner0101]

dear max
thanks for your responding
im new to this website and opensource methods
my thesis contain compressible flows and i just wanna know how can i use openlb and add compressible condition to it ?
is it possible ?
and my major question is how can i use openlb and turn it to special case !
for example using this method for simulation flow around some historical building !
i was confused to understand that and i’d be appreciated if you help me .
best regards
thanks for your kind .

[mgaedtke]

Quote:

dear guys
i want to change the dynamic classes to compressible by changing the collision equation for compressible flow
i had the equation of lattice boltzmann in compressible ( feq )
then i don’t know how to change the dynamics classes !
its just too complicated
is there anybody can help me ?
thanks .

hey cloner,

I would suggest you start with simple cases first. Do you have a STL-file for the building? You could try an incompressible flow around that geometry first. If you want to see how STL import to geometry is done in OpenLB, have a look at the example cylinder3d.

What compressible modell do you plan to implement?

So, you found the f^eq definition in the dynamics files. Copy and pasting a whole dynamic class until you get a compiling version without any changes exept for the classes name should be the first step. Afterward you should be able to change the collision step towards your needs.

Best, Max

[Author]

Posts