管内強制対流熱伝達に対する電気流体力学的効果の数値解析〔熱工学, 内燃機関, 動力など〕

概要

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The heat transfer enhancement method without accompanying large increases of pressure loss by applying electric field in restricted regions near the heat transfer surfaces was numerically investigated. Navier-Stokes equation including a Coulomb force term for the channel flow in low Reynolds number regions of about 1470 was solved with the Large Eddy Simulation (LES) technique and Dynamic Sub Grid Scale modeling. The conservation equation of electric current and Poisson equation were simultaneously solved with the assumption that the current was mainly transferred by the negative charges, based on the electrostatic probe experiments. The numerical results showed that the enhancement ratio of the heat transfer (34 times) was much larger than the increase ratio of the pressure drop (9 times) and that the ratio between these two almost agreed with the experiments. The numerical model showed that the significant increase of the heat transfer enhancement compared to the increase of the pressure drop was due to the effect of the secondary flow induced by the electric fields.
一般社団法人日本機械学会の論文
1998-04-25