Laminar dispersed two-phase flows at low concentration. [Pt.] 3, Pseudo-turbulence

• Autorzy: Achard J. L. , Cartellier A.
• Języki publikacji: EN

Abstrakty

EN

Two preceding papers (Parts I and II) present a generalised system of equations to describe non-turbulent flows of inclusion-fluid mixtures. The two first order equations for each phase correspond to equations of the standard two-fluid models. The closure problem, consisting in the derivation of constitutive laws for unknown quantities (mainly interaction terms between phases) is not encountered in our approach; these quantities are provided by two infinite sequences of higher order equations controlling more and more conditioned "disturbance fields". The difficulty is then to truncate in a consistent way these sequences using a diluteness assumption. Agitation terms are also unknowns, both in first and higher orders equations. These terms, which result from various types of micro-motions of both phases (the so-called pseudo-turbulence phenomena), have not been related to disturbance fields at the end of the two preceding papers; they just came out as unclosed correlation functions. This paper gives each correlation function a specific expression; some of them must be approximated due to diluteness in order to be effectively computed.

Słowa kluczowe

EN

pseudo-turbulence phenomena; laminar flow; pseudo-turbulent tensor; composite pseudo-turbulent tensor

PL

zjawisko pseudoturbulencji

• Wydawca: Instytut Podstawowych Problemów Techniki PAN
• Czasopismo: Archives of Mechanics
• Rocznik: 2001
• Tom: Vol. 53, nr 2
• Strony: 123--150
• Opis fizyczny: Bibliogr. 49 poz.

Twórcy

autor

Achard J. L.

autor

Cartellier A.

• Laboratoire des Ecoulements Geophysiques et Industriels CNRS-UJF-INPG, B.P. 53X, 38041 Grenoble Cedex, France,