[kukikano]

Is it possible to set a different piston motion profile in the engineFoam solver in a simple way? (To investigate innovative engine design.) Say, I want the piston height simply to be equal to a*cos(crankAngle)+b, instead of the current function which includes the ratio of connecting rod length to crankshaft radius.

I am not fluent in C++ (nor OpenFOAM), so your help on this would be appreciated. By looking through the source files I have found that the file $HOME/OpenFOAM/OpenFOAM-1.2/src/engine/engineTime/engineTime.C appears to set the piston position based on the crank angle. (The "scalar engineTime::pistonPosition(const scalar theta) const" expression.) I tried to modify the expression and run wmake in OpenFOAM-1.2/src/engine/, but with no effect on the simulations.

I may be off-beam in my attempts but this should be a fairly simple thing to do, right?

Thanks,

Rikard