I want to observe karman vortex by pimplefoam
first of all, I am sorry that I am not good in english.
I am a newbie in Openfoam and CFD.
I want to observe vortex created by pimplefoam around circular cylinder
and compare with RASmodel and LESmodel
actually I have alreay tried creating the case created by LESmodel and observed vortex successfully.
but result of RASmodel is not good.
there is no vortex in RASmodel and I seems like laminar flow.
I don't know why vortex don't appear in RASmodel.
i think the problem is in k or epsilon.
please somebody help me.
it take for 2week to find what problem is.
my case file is attached.
inlet velocity is 1m/s.
channel width is 4.5m
channel length is 17.5m
k in 0 is 0.000375 by (3/2)*(U*I)^2 (I = 0.005)
epsilron in 0 is 0.0000026 by (Cu^0.75)(k^1.5 / l) (Cu=0.09 , I = 20% of channel width)
nu is 1e-06.
plese help me
Although this thread is written by me, I reply myself for other foamer who encounter to same problem.
Problem is Mesh.
I remake mesh more finer. Approximatly 2times.
Then vortex appeared.
Other condition is same.
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