Divergence in Cd values -- CFD Online Discussion Forums

February 26, 2015, 06:17	Divergence in Cd values	#1
Super Mario New Member Abhilash Savalgi Join Date: Feb 2015 Posts: 2 Rep Power: 0	Hello! I am a beginner in CFD domain. I am currently simulating a helicopter fuselage to calculate drag coefficient(Cd) using OpenFOAM. I have entered the forceCoeffs function in the controlDict file with proper modifications(Aref, Lref values). But, I am getting absurd values for Cd and I guess the values are diverging (around 10e+50 aftr 500 iterations). I did postprocessing of the case using paraview and found values for pressure and velocities within ranges (Vel. Mag. [0-52] and Press. [-688 to 750] ). So, I guess there's nothing wrong with the simulation setup.Can anyone please guide me as to where I might be going wrong? Thanks!

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