[carolee]

Hi,

I am new to openfoam, i would like to add source term (ultrasonic radiation force) to momentum equation, can someone tell me how?

thanks

[Tobermory]

Source terms are most easily implemented using fvOptions. Try googling semiImplicitSource, for example, but just be careful - the terminology for fvOptions changed in the last few years, so the syntax for older posts might be wring (although the system still works in the same way). Good luck!