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Air flow through low surface area porous media
Conklin, Glenn E.
Conklin, Glenn E.
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thesis
Adobe PDF, 19.83 MB
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1952-08
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Electronic dissertations
Electronic dissertations
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Abstract
The purpose of this study was to investigate the flow of air through porous media of extremely low surface area (average pore diameters of 0.01 - 0.1 mm).
During the past seventeen years a large number of investigators have studied the flow of gases through porous media. Out of this work has come evidence that flow of non-absorbable gases through porous media can be described in terms of two limiting conditions: viscous flow and diffusive flow. Many investigators have assumed that flow through porous media of relatively low surface area could be described in terms of viscous effects alone. However recent developments in the theory of diffusive flow have indicated that this assumption is not valid. The theory indicates that even for media with surface area as low as 0.005 $m^2/gm$ a small portion of the total flew should be attributed to diffusion.
That portion of the conductance of a gas through a porous medium due to viscous effects is directly dependent upon the average pressure. A number of investigators have not realized the importance of the relationship and have used equations to describe flow through porous media as if the gas were not compressible.
Apparatus and techniques were developed to investigate the flow of gasses through media of extremely low surface area for the purpose of confirming the theoretical deductions that: (1) a diffusive component of flow is present (2) the viscous component of flow is directly dependent upon the average pressure.
Table of Contents
The problem -- Review of literature and theory -- Materials used and experimental methods -- Data and results -- Summary
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Thesis (M.S.)-- University of Wichita, Department of Chemistry
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Wichita State University
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Wichita State University