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Please Visit Our Sponsor Gift Shop Darcy Law of Thermo-Osmosis for Zero Net Mass Flow at Low TemperatureS.W.K. Yuan and T.H.K. Frederking University of California, Los Angeles Chemical Engineering Dept. Los Angeles, CA 90024, U.S.A. ABSTRACT In frequently used solid-fluid material combinations of porous medium systems, the thermal conductivity (k) of the solid is significantly larger than the fluid values. In contrast, at low temperatures, the solid k-value may be quite small, and the fluid may reach high k-values locally or over an extended temperature range. In Helium-4 below the lambda temperature (superfluid He II) thermo-osmotic forces dominate the transport phenomena. Darcy transport at low speeds in the laminar range is studied for the material combination of low conductivity solids and He II. The continuum conditions of the two-fluid model are considered. The resulting thermo-osmotic equation does not depend on the superfluid density ratio explicitly. The theoretical results obtained are compared with various data for different types of porous media. Good agreement with prediction is found within uncertainty limits associated with porous medium characterization. Download this Paper Do You Know Someone Who Needs A Job in Engineering, Physics or Chemistry? About the author- Dr. Sidney Yuan is a consultant in the field of Low Temperature Physics and Cryogenics, and has written a Book on Cryogenics and published extensively in the field. E-Mail. Bookmark This Page Send This Page To A Friend Place Your Ad Here For As Little As $1 Per Day About Us | Add URL | Advertise with Us | Auction | Awards | Contact Us | Discussion Forum | Links | Search This Site | Send This Page | Shop | Top Ten Sites Copyright 2000 Yutopian, All Rights Reserved |
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