determine the right settings -- CFD Online Discussion Forums

February 17, 2011, 06:20	determine the right settings	#1
Lombo New Member Join Date: Feb 2011 Posts: 9 Rep Power: 15	how i decide the time step? my 2d problem const of a beam section (0.3m x 0.3m ) invested by a flow at 15 m/s. the domain along x axle is from -5 to 10 m and and from -4 to 4 along y axle. i would like to investigate the oscillation of kolmogorov scale of vortex, so i made a mesh from 0.001 at the section to expand up to 0.150 at the boundary. i use a k-om sst unsteady model with a time step of 0.005, but the lift and drag plot are so bad..

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