Numerical simulation and modeling of a laboratory MWD mud siren pressure pulse propagation in fluid filled pipe

This article presents modeling and numerical simulations of a laboratory mud siren pressure pulse propagation in a water filled pipeline. The unsteady flow behavior is simulated and modeled with ANSYS CFX11 (Computational Fluid Dynamics (CFD) commercial code). Time domain simulations were performed for three different carrier frequencies of the mud siren, and the results were also analyzed in frequency using a Fast Fourier Transformation code in MATLAB. The estimated results from the model are compared with real experimental data in both time and frequency domain in order to validate the model. A pretty good agreement is obtained between the predicated and measured pressure pulses at different locations along the pipeline for all experimental runs.