Experiment and Numerical Simulation of Asymmetric Pipe Wall Thinning Behind an Orifice by Combined Effect of Swirling Flow and Orifice Bias Available to Purchase

In this paper, combined influence of swirling flows and orifice biases is investigated by a mass transfer experiment and a numerical simulation. In the mass transfer experiment, pipe wall thinning behind an orifice in a circular pipe is evaluated with benzoic acid instead of steel. In addition, a numerical simulation for velocity and concentration fields is performed to estimate mass transfer behind the orifice. The numerical simulation using the standard k-ε model of turbulence well reproduces the distributions of Keller coefficient behind the orifice, which agree with those of the experiment in no-swirling flows. Experimental results show asymmetric pipe wall thinning is occurred under combined influence of a swirling flow and a slight orifice bias, while a symmetric pipe wall thinning is seen in the no-swirling flows even with the orifice bias.