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This paper presents a modification to the Gizburg-Landau model by means of a new definition of stress tensor for liquid-vapour mixture. The proposed modification takes into account stresses arising in response to density gradients that models the contribution of interfacial areas in the homogeneous Ginzburg-Landau model. The additional capillary stress is derived from the constitutive equation postulated by Korteweg. The modified model has beentested on classical experiments of water-steam flows, such as Moby Dick and BNL. It seems that the inclusion of capillary stresses brings about a significant improvement both in the mass flow rate and pressure distribution predictions. These facts promise the possibility of better description of phenomena occurring in choked two-phase flows.
Czasopismo
Rocznik
Tom
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61--85
Opis fizyczny
Rys., wykr., tab.,Bibliogr. 14 poz.,
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autor
- Institute of Fluid-Flow Machinery, Polish Academy of Sciences, 80-952 Gdańsk, Fiszera 14
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Bibliografia
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bwmeta1.element.baztech-article-BGPK-0055-1067