Rarefied gas flow in microtubes at different inlet-outlet pressure ratios | Zendy

Zhichao Yang | Zendy; Suresh V. Garimella | Zendy

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Rarefied gas flow in microtubes at different inlet-outlet pressure ratios

Author(s) -

Zhichao Yang,

Suresh V. Garimella

Publication year - 2009

Publication title -

physics of fluids

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.188

H-Index - 180

eISSN - 1089-7666

pISSN - 1070-6631

DOI - 10.1063/1.3139310

Subject(s) - knudsen number , mechanics , mach number , inlet , physics , flow (mathematics) , pressure drop , mass flow , knudsen flow , isothermal flow , mass flow rate , mass flow meter , thermodynamics , flow coefficient , volumetric flow rate , open channel flow , geology , geomorphology

A model is developed for rarefied gas flow in long microtubes with different inlet-outlet pressure ratios at low Mach numbers. The model accounts for significant changes in Knudsen number along the length of the tube and is therefore applicable to gas flow in long tubes encountering different flow regimes along the flow length. Predictions from the model show good agreement with experimental measurements of mass flow rate, pressure drop, and inferred streamwise pressure distribution obtained under different flow conditions and offer a better match with experiments than do those from a conventional slip flow model.

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