Lift Coefficient for Vehicle Simulation
Hey everyone,
I've set up a simulation for a VW Beetle and am currently only getting Cl and Cd values for the vehicle as a whole. I'd like to get Cl for the front and rear separately as well, but can't see how to do this in Star CCM+. I've currently got it set up so that reports have the car body as their input parts, I can't see how I could set it up to get two separate lift coefficients acting on that body. Any help would be greatly appreciated. Steve |
Hi Steve,
This is a bit late but if you haven't solved it yet... You can make a field function in order to get how much each cell on the surface of your vehicle is contributing to the Cl or Cd. Something similar to this: Code:
(${Fx_cell}/$$Area.mag())/(0.5*${rho}*pow(${vcar},2)) Code:
Fx_cell = (($${Area}[0]*${MeanCPMonitor}*0.5*${rho}*pow(${vcar},2))+(${MeanWallShearXMonitor}*$$Area.mag())) To get the values make two sum reports (one for each half), as Scalar field you choose the one previously defined (Cl/Cd for each cell) and as parts you choose the threshold you've created. Cheers, Magnus |
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