化工进展
化工進展
화공진전
CHEMICAL INDUSTRY AND ENGINEERING PROGRESS
2013年
11期
2555-2561
,共7页
刘晨%肖晶晶%王红星%邱挺
劉晨%肖晶晶%王紅星%邱挺
류신%초정정%왕홍성%구정
环己烯%水合%环己醇%计算流体力学
環己烯%水閤%環己醇%計算流體力學
배기희%수합%배기순%계산류체역학
cyclohexene%hydration%cyclohexanol%computational fluid dynamics
环己烯直接水合是制备环己醇的一种新工艺,本文利用体积率函数法(VOF 法)建立了环己烯水合流动过程的数学模型,考虑了汽-液相间摩擦力动量源项、表面张力动量源项和多孔介质动量源项,定量描述了汽-液两相逆流流动过程。根据计算流体力学(CFD)模型模拟了黏度、表面张力和流动阻力对流动的影响,结果表明黏度和表面张力影响液膜厚度和液面波动程度,进而影响传质;流动阻力过大会导致液膜断裂,不利于传质。
環己烯直接水閤是製備環己醇的一種新工藝,本文利用體積率函數法(VOF 法)建立瞭環己烯水閤流動過程的數學模型,攷慮瞭汽-液相間摩抆力動量源項、錶麵張力動量源項和多孔介質動量源項,定量描述瞭汽-液兩相逆流流動過程。根據計算流體力學(CFD)模型模擬瞭黏度、錶麵張力和流動阻力對流動的影響,結果錶明黏度和錶麵張力影響液膜厚度和液麵波動程度,進而影響傳質;流動阻力過大會導緻液膜斷裂,不利于傳質。
배기희직접수합시제비배기순적일충신공예,본문이용체적솔함수법(VOF 법)건립료배기희수합류동과정적수학모형,고필료기-액상간마찰력동량원항、표면장력동량원항화다공개질동량원항,정량묘술료기-액량상역류류동과정。근거계산류체역학(CFD)모형모의료점도、표면장력화류동조력대류동적영향,결과표명점도화표면장력영향액막후도화액면파동정도,진이영향전질;류동조력과대회도치액막단렬,불리우전질。
Cyclohexene direct hydration is a new process to prepare cyclohexanol. A VOF (volume of fluid) method is presented for predicting the flowing process of the two-phase countercurrent falling film. Three important momentum source terms,including interface shear stress,surface tension and porous medium source term,are considered. On the basis of using a CFD (computational fluid dynamics) model to simulate the influence of viscosity,surface tension and flow resistance,the results show that the viscosity and the surface tension have great influence on the thickness and the fluctuation of liquid film which further affect the mass transfer coefficient,and that high flow resistance will cause liquid membrane rupture which interferes with the mass transfer.