[chandra shekhar pant]

Dear Foamers,



As I had written many threads for my problem of Propeller case and still struggling to make it work for turbulent case. I had made the CAD geometry, innerCylinder_small, innerCylinder, outerCylinder same as that of propeller tutorial. As such I have changed only the input parameters of inlet velocity and \omega (in rad/sec). The laminar case seems to work properly but the turbulent case (using default k-\epsilon) seems to blow off after t=0.28 sec. Then many FOAMERS has suggested me to change my mesh according to the y+(plus) values, although using the wall function (not sure, if it works or not). And found that the y+(plus) for k-\epsilon and k-\omega SST are of the order of 3 and 300 respectively. The dat files originated from the pimpleFoam -postProcess -func yPlus is attached herewith. Could any one please comment on these values.


Also a very weird point, I used the negative angle of rotation which is clock-wise and the free stream velocity be -ve, exactly similar to that of the tutorial case. But surprisingly it rotates in opposite direction as that of the tutorial (off-course making the same view axes). Just wondering, if doing some thing very incorrect that these things are happening.