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oai:docta.ucm.es:20.500.14352/509952025-09-18T15:02:01Zcom_20.500.14352_14col_20.500.14352_15

Numerical model of non-isothermal pervaporation in a rectangular channel García Villaluenga, Juan Pedro Cohen, Yoram 536 Pervaporation Non-Isothermal Numerical Model Finite Element Method Ethanol Dehydration Trichloroethylene Iso-Propanol Termodinámica 2213 Termodinámica © 2005 Elsevier B.V. A numerical model of non-isothermal pervaporation was developed to investigate the development of the velocity, concentration and temperature fields in rectangular membrane module geometry. The model consists of the coupled Navier-Stokes equations to describe the flow field, the energy equation for the temperature field, and the species convection-diffusion equations for the concentration fields of the solution species. The coupled nonlinear transport equations were solved simultaneously for the velocity, temperature and concentration fields via a finite element approach. Simulation test cases for trichloroethylene/water, ethanol/water and iso-propanol/water pervaporation, under laminar flow conditions, revealed temperature drop axially along the module and orthogonal to the membrane surface. The nonlinear character of the concentration and temperature boundary-layers are most significant near the membrane surface. Estimation of the mass transfer coefficient assuming isothermal assumption conditions can significantly deviate from the non-isothermal predictions. For laminar conditions, predictions of the feed-side mass transfer coefficient converged to predictions from the classical Leveque solution as the feed temperature approached the permeate temperature. Depto. de Estructura de la Materia, Física Térmica y Electrónica Fac. de Ciencias Físicas TRUE pub 2023-06-20T10:41:16Z 2023-06-20T10:41:16Z 2005 journal article https://hdl.handle.net/20.500.14352/50995 0376-7388 10.1016/j.memsci.2005.03.025 eng restricted access application/pdf Elsevier B. V.