I am running a 2 way FSI in transient structural and fluent and had a simple question that I have not been able to find the answer to. I have run my simulation with the same time step size twice.The first time, in the table where I input my load in transient structural, I only input a few values and let the program impose ramp functions between the values I set. The second time, I input a load value for every single timestep in my simulation. The results I got in each simulation where drastically different. Why is this the case? Why doesn't the simulation treat the ramping functions the same way as tabular inputs for each timestep? I'd like to increase the timestep by a factor of 10, but I do not want to sacrifice the accuracy of my model because I cannot input load values for all 1000 timesteps.