Extrapolation tool comparison to full model not agree in waveform shape Answered
I made a small model (2" x 4") axial symmetric model with a pressure source. I ran the model and recorded the acoustic pressure 3" from the pressure source and also set up an extrapolation output about 10 mesh elements from the pressure source. I used the extrapolation tool to compute the acoustic pressure 3" from the pressure source and compared it to that recorded from the full model in both the time and frequency domains. In the time domain, the results have similar PTP amplitudes but completely different shapes. In the frequency domain, the magnitude of the frequency responses compare well. Is the differences in the time domain expected or does it indicate that I don't have the problem set up correctly?