Pressure Stratification Effects on Multiphase Transport Across a Vertical Slot Porous Insulation

[+] Author and Article Information
H. C. Tien, K. Vafai

Department of Mechanical Engineering, The Ohio State University, Columbus, OH 43210

J. Heat Transfer 112(4), 1023-1031 (Nov 01, 1990) (9 pages) doi:10.1115/1.2910474 History: Received July 21, 1989; Revised March 12, 1990; Online May 23, 2008


In this work, thermal stratification effects on heat and mass transfer in a porous insulation are analyzed. The vertical boundaries of the porous system are partially permeable for simulating holes or cracks in wall. Hydrostatic pressure variations are considered on the vertical boundaries and a set of realistic boundary conditions is imposed on the system under consideration. The transient intercoupled equations governing the complicated transport process along with the convective boundary conditions are solved by an efficient numerical scheme. The dependence of the Nusselt number and the field variables on several important parameters is investigated systematically. The results clearly show that infiltration can have a major effect on the overall heat transfer even for small pressure gradients across the insulation slab. Furthermore, it has been found that the opening locations have a pronounced effect on the heat transfer rate across the slab and the corresponding condensation rate. The qualitative information extracted from this investigation can be used to diminish the infiltration and condensation problems in the design of building insulation.

Copyright © 1990 by The American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.






Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In