Abstract
Liquid metal magnetohydrodynamic (LMMHD) generators use two-phase flow, for example, of an organic vapor through mercury, for Rankine cycle operation. Unfortunately, the efficiencies achieved in such generators have been reported to suffer from inhomogeneity of the flow and even instability for very high void fraction. We suggest the use of the magnetic fluid concept—single domain iron particles suspended in the metallic carrier liquid making it a “magnetic” liquid, so to speak—to improve the stability of the flow. Through standard stability analysis, we will show that a magnetic field placed parallel to the flow indeed improves greatly the range of void fractions for stable flow. Universality and scaling properties of the results are also discussed.
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