Vortex shedding flowmeter pulsating flow CFD studies
The computational analysis of vortex shedding flow is presented, using the commercially available computational fluid dynamics(CFD) software package PHOENICS. In this analysis it is shown how the use of the conventional PHOENICS default first-order hybrid-upwind convective differencing scheme provides an excellent example of the effects of multidimensional false diffusion. These effects are substantially reduced with the introduction of an alternative scheme, SUCCA ( Skew Upwind Corner Convection Algorithm), for the modelling of convective transport in 2D and 3D analyses; resulting in the promotion of continuous vortex shedding for the 2D model. The mechanism of pulsating flow influence on the vortex shedding process has also been simulated. The results show that a complex transient phenomenon such as vortex shedding can be analysed using the PHOENICS code but only with the implementation of an alternative convection algorithm. The results also demonstrate the SUCCA scheme's ability to accurately represent convective transport and hence substantially reduce the effects of multidimensional false diffusion in numerical flow analyses.