Asymptotic solution for coupled heat and mass transfer during the solidification of high water content materials     

齐德瑄  何凯  杜如虚  张义同 《天津大学学报(英文版)》2010,16(4):239-243

This paper focuses on obtaining an asymptotic solution for coupled heat and mass transfer problem during the solidification of high water content materials. It is found that a complicated function involved in governing equations can be approached by Taylor polynomials unlimitedly, which leads to the simplification of governing equations. The unknown functions involved in governing equations can then be approximated by Chebyshev polynomials. The coefficients of Chebyshev polynomials are determined and an asymptotic solution is obtained. With the asymptotic solution, the dehydration and freezing fronts of materials are evaluated easily, and are consistent with numerical results obtained by using an explicit finite difference method.  相似文献   

美国机械工程专业设计课程改革动向及其启迪   总被引：2，自引：0，他引：2  

邹慧君  杜如虚 《中国大学教学》1998,(6)

随着经济改革的全面发展，面对２１世纪产品竞争日益加剧的挑战，加速对机械工程专业课程内容和体系的革新已成为广大机械工程教育者的共识，也是迅速培养新世纪的中国机械工程专业人才的关键。然而，如何进行改革还有许多值得商榷的问题。最近，美国机械工程师协会提出了...  相似文献