Application of Korteweg's capillary stress tensor in momentum balance for flashing flow

• Autorzy: Badur J. , Banaszkiewicz M.
• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

Ginsburg-Landau model; Korteweg; liquid-vapour mixture; mass flow; stress tensor; two-phase flows

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN ; Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archives of Thermodynamics
• Rocznik: 1998
• Tom: Vol. 19, no 1/2
• Strony: 61--85
• Opis fizyczny: Rys., wykr., tab.,Bibliogr. 14 poz.,

Twórcy

autor

Badur J.

autor

Banaszkiewicz M.

• Institute of Fluid-Flow Machinery, Polish Academy of Sciences, 80-952 Gdańsk, Fiszera 14