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New Fluids Research Study Findings Recently Were Reported by Researchers at Ecole Centrale (A macroscopic model for slightly compressible gas...

July 8, 2014



New Fluids Research Study Findings Recently Were Reported by Researchers at Ecole Centrale (A macroscopic model for slightly compressible gas slip-flow in homogeneous porous media)

By a News Reporter-Staff News Editor at Physics Week -- Research findings on Fluids Research are discussed in a new report. According to news reporting from Chatenay Malabry, France, by VerticalNews journalists, research stated, "The study of gas slip-flow in porous media is relevant in many applications ranging from nanotechnology to enhanced oil recovery and in any situation involving low-pressure gas-transport through structures having sufficiently small pores. In this paper, we use the method of volume averaging for deriving effective-medium equations in the framework of a slightly compressible gas flow."

The news correspondents obtained a quote from the research from Ecole Centrale, "The result of the upscaling process is an effective-medium model subjected to time- and length-scale constraints, which are clearly identified in our derivation. At the first order in the Knudsen number, the macroscopic momentum transport equation corresponds to a Darcy-like model involving the classical intrinsic permeability tensor and a slip-flow correction tensor that is also intrinsic. It generalizes the Darcy-Klinkenberg equation for ideal gas flow, and exhibits a more complex form for dense gas. The component values of the two intrinsic tensors were computed by solving the associated closure problems on two-and three-dimensional periodic unit cells. Furthermore, the dependence of the slip-flow correction with the porosity was also verified to agree with approximate analytical results. Our predictions show a power-law relationship between the permeability and the slip-flow correction that is consistent with other works."

According to the news reporters, the research concluded: "Nevertheless, the generalization of such a relationship to any configuration requires more analysis."

For more information on this research see: A macroscopic model for slightly compressible gas slip-flow in homogeneous porous media. Physics of Fluids, 2014;26(5):241-269. Physics of Fluids can be contacted at: Amer Inst Physics, Circulation & Fulfillment Div, 2 Huntington Quadrangle, Ste 1 N O 1, Melville, NY 11747-4501, USA. (American Institute of Physics - www.aip.org/; Physics of Fluids - pof.aip.org/)

Our news journalists report that additional information may be obtained by contacting D. Lasseux, Ecole Cent Paris, EM2C, UPR CNRS 288, F-92295 Chatenay Malabry, France. Additional authors for this research include F.J.V. Parada, J.A.O. Tapia and B. Goyeau.

Keywords for this news article include: France, Europe, Fluids Research, Chatenay Malabry

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Physics Week


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