HEAT TRANSFER CONTROL IN THERMOMAGNETIC CONVECTION OF PARAMAGNETIC FLUIDS IN LAMINAR, TRANSIENT AND TURBULENT REGIMES

摘要

The present study deals with combined experimental and numerical investigations of the thermo-magnetic convection (i.e. combined effects of the thermal buoyancy and of the imposed magnetic field gradients) in a differentially heated cubical enclosure filled with a magnetized fluid. We demonstrate that by changing orientation of the imposed magnetic field gradient a dramatic reorganization of the flow, turbulence and thermal structures takes place, resulting in a significant alternation of the wall heat transfer compared to its neutral state (no magnetic field). By selecting a proper working fluids and by applying the state-of-art superconductive magnet that is able to generate magnetic field strengths up to 10 T, we were able to cover an extensive range 10~5