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.
Skip Nav Destination
Article navigation
Research Papers
Pressure Stratification Effects on Multiphase Transport Across a Vertical Slot Porous Insulation
H. C. Tien,
H. C. Tien
Department of Mechanical Engineering, The Ohio State University, Columbus, OH 43210
Search for other works by this author on:
K. Vafai
K. Vafai
Department of Mechanical Engineering, The Ohio State University, Columbus, OH 43210
Search for other works by this author on:
H. C. Tien
Department of Mechanical Engineering, The Ohio State University, Columbus, OH 43210
K. Vafai
Department of Mechanical Engineering, The Ohio State University, Columbus, OH 43210
J. Heat Transfer. Nov 1990, 112(4): 1023-1031 (9 pages)
Published Online: November 1, 1990
Article history
Received:
July 21, 1989
Revised:
March 12, 1990
Online:
May 23, 2008
Citation
Tien, H. C., and Vafai, K. (November 1, 1990). "Pressure Stratification Effects on Multiphase Transport Across a Vertical Slot Porous Insulation." ASME. J. Heat Transfer. November 1990; 112(4): 1023–1031. https://doi.org/10.1115/1.2910474
Download citation file:
Get Email Alerts
Cited By
Entropic Analysis of the Maximum Output Power of Thermoradiative Cells
J. Heat Mass Transfer
Molecular Dynamics Simulations in Nanoscale Heat Transfer: A Mini Review
J. Heat Mass Transfer
Related Articles
Drying of Porous Materials in a Medium With Variable Potentials
J. Heat Transfer (August,1991)
Simultaneous Heat and Mass Transfer Accompanied by Phase Change in Porous Insulation
J. Heat Transfer (February,1986)
Condensation Effects in a Fibrous Insulation Slab
J. Heat Transfer (August,1986)
Simultaneous Fog Formation and Thermophoretic Droplet Deposition in a Turbulent Pipe Flow
J. Heat Transfer (February,1991)
Related Proceedings Papers
Related Chapters
Multiphase Flow Simulations of Sediment Particles in Mixed-flow Pumps
Mixed-flow Pumps: Modeling, Simulation, and Measurements
Thermal Design Guide of Liquid Cooled Systems
Thermal Design of Liquid Cooled Microelectronic Equipment
Macropore Spatial Variability of CT-Measured Solute Transport Parameters
Intelligent Engineering Systems through Artificial Neural Networks, Volume 20