undulating foil, negative cell volume
I have to simulate the undulating hydrofoil. I am using symmetry boundary conditions (top, bottom, sides) to mimic the 2d effect on the hydrofoil. It undulates as per the udf when viewed in Display zone motion. However, i keep getting negative cell volume error at a particular time-step. I have tried to decrease the time-step, i have tried all different settings for the dynamic mesh. I am not sure what the error is, or how to improve! HELPP!