1D AND 2D NUMERICAL VERIFICATION ON FREEZE DRYING OF INITIALLY POROUS MATERIAL FROZEN FROM AQUEOUS SOLUTION

摘要：

　　Freeze drying of initially porous material frozen from aqueous solution was proposed in the present study aiming at improving the process economy.1D and 2D governing equations were,respectively,formulated and solved numerically using the finite volume method to verify the proposal.Results show that the idea proposed is feasible and the drying time decreases with the increase in the initial porosity.There exists the shortest drying time corresponding to about 0.3~0.35 of an initial saturation for a spherical sample.Examination on variations of effective mass diffusivity,KS and effective heat conductivity,λ+KTΔH shows that the drying rate-controlling factor changes from mass transfer to heat transfer at the later stage of drying with increase in the instantaneous porosity.

关键词： freeze drying initial porosity drying time simulation heat and mass transfer

作者: M.Chen W.Wang Y.Q.Pan K.Yu G.H.Chen

作者单位: College of Life Science,Dalian Nationalities University Liaohe West Road 18,Dalian Development Zone, College of Life Science,Dalian Nationalities University Liaohe West Road 18,Dalian Development Zone, Department of Chemical Engineering,Dalian University of Technology Linggong Road 2,Dalian,116024,Chi Department of Chemical and Biomolecular Engineering,The Hong Kong University of Science and Technolo

会议类型: 国际会议

会议名称: The 18th International Drying Symposium Conference(第十八届国际干燥学术大会(IDS2012))

会议地点: 厦门

会议语种:英文

页码: 1-7

在线出版日期: 2012-01-11（万方平台首次上网日期，不代表论文的发表时间）