Proposal of a mathematical model to control the flow rate applying the Magnetohydrodynamic effect

摘要

This study has shown for the electromagnetic flow meter that basic physical and electrochemical phenomena can be modelled such that engineers can make forecasts about new generation devices. Firstly by using basic models, it can show that even in pure water and other polarisable liquids the Magnetohydrodynamic effect is strong enough to be measured. The possible impact on technology is enormous: the application range of electromagnetic flow meters is wider than it was believed before. The trade-off is that high-ohmic electronic circuits must be implemented because no electric current can flow in the medium. But modern electronic devices offer this possibility. Secondly, we can use the Finite-Element technique for geometric shape optimisation. Naturally, optimisation using actual prototypes can be tedious and computations allow shorter design cycles. On the other side the simulation of the Magnetohydrodynamic flow meter demands software that easily and effectively handles multiphysics problems. Because of turbulent flows, it is required direct numerical simulations or large-eddy simulations. This leads to the following new principle for flow metering.