dimensional or dimensionless?
Hi Foamers
can some1 clear this for me plz: is OpenFoam a dimensional solver? or dimensionless solver like fluent? 
fluent is dimensionless solver?
however OpenFOAM, check dimensions, and its dimensional solver without doubt 
Thanks Nima
i think i couldn't ask my question in a good way! my means was that if in simulation we want the Re=(u*d)/nu=180 , Can we set velocity(u), diameter(d) or nu in arbitary values to obtain Re=180 ? means: is simulation with u=180 m/s , d=1 m , nu=1 same with simulation with u=180*10^6 , d=1 , nu=10^6 ???? Regards 
mathematically, yes. but by the view of numerical method, it maybe has differences for numerical methods used.
but I checked it for a single cylinder as a test case, I have got the same answers. U=100, nu=1,<==>U=1,nu=0.01 but there is difficulty in convergence of answer in first test case. 
Thanks niaz, was useful
So, i can change the values of air and water's properties in interfoam to obtain the Reynolds and Froude number that i want. and the only difficulty is convergence? 
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Thank you so much

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