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藪中 俊介; 藤谷 洋平*
Physical Review E, 109(6), p.064610_1 - 064610_19, 2024/06
被引用回数：5 パーセンタイル：73.54(Physics, Fluids & Plasmas)We consider a binary fluid mixture, which lies in the one-phase region near the demixing critical point, and study its transport through a capillary tube linking two large reservoirs. We assume that short-range interactions cause preferential adsorption of one component onto the tube's wall. For transport processes induced by gradients of the pressure, composition, and temperature along a cylindrical tube, we obtain the formulas of the Onsager coefficients to extend our previous results on isothermal transport, assuming the critical composition in the middle of each reservoir in the reference equilibrium state.
藪中 俊介; 藤谷 洋平*
Physics of Fluids, 34(5), p.052012_1 - 052012_18, 2022/05
被引用回数：7 パーセンタイル：51.19(Mechanics)弱い圧力、化学ポテンシャル勾配を加えた場合の毛細管中での二元混合系の等温環境下の輸送を考える。壁面での選択的吸着効果が強い際には、壁面近くに相関長程度の厚さの吸着層が形成される。そのため毛細管中の組成が不均一となり、相関長も不均一となる。我々はこのような状況での流体力学をLocal renormalized functional theoryを用いて考察し流量の計算を行った。
藪中 俊介; 藤谷 洋平*
no journal, ,
We consider a binary fluid mixture, which lies in the one-phase region near the demixing critical point, to consider its dynamics through a capillary tube. We assume preferential adsorption of one component on the tube's wall due to short-range interactions. The resultant adsorption layer becomes very thick near the critical point, inside which the thermal force density under a temperature gradient is nonvanishing. This enables a temperature difference to cause the total mass flow of the mixture, which represents thermoosmosis. We predict that, for any binary mixture near the critical point with the upper (lower) critical solution temperature, the direction of the total mass flow is the same as (opposite to) the temperature gradient, respectively.
藪中 俊介; 藤谷 洋平*
no journal, ,
弱い圧力,化学ポテンシャル勾配を加えた場合の毛細管中での二元混合系の浸透現象を考える。壁面での選択的吸着効果が強い際には、壁面近くに相関長程度の厚さの吸着層が形成される。そのため毛細管中の組成が不均一となり、相関長も不均一となる。我々はこのような状況での流体力学をLocal renormalized functional theoryを用いて考察し流量の計算を行ってきた。今回の講演では、流量の換算温度に関するスケーリング則に関して議論する。
