Understanding multiphase flow and heat transfer : perception, reality, future needs

• Autorzy: Podowski M.
• Języki publikacji: EN

Abstrakty

EN

The purpose of this paper is to overview selected physical phenomena governing two- and multiphase flows and heat transfer, including scale-dependent modelling issues, gas/liquid and gas/liquid/solid interfacial interactions, and theoretical and computational modelling concepts. The main emphasis is given to the assessment of the current status against ultimate expectations on the one hand, and practical needs on the other hand. Several examples are used to illustrate the state-of-the-art theoretical and numerical predictions of two-phase flow at different scale levels, geometries and conditions.

Słowa kluczowe

EN

CMFD; multiphase flow and heat transfer; physical models

PL

CMFD; modelowanie fizyczne; przepływy ciepła; przepływy wielofazowe

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN ; Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archives of Thermodynamics
• Rocznik: 2005
• Tom: Vol. 26, no. 3
• Strony: 3--20
• Opis fizyczny: Bibliogr. 15 poz., rys., tab., wykr., wz.

Twórcy

autor

Podowski M.

• Department of Mechanical, Aerospace and Nuclear Engineering and Centre for Multiphase Research, Rensselaer Polytechnic Institute, Troy, NY 12180, USA

Bibliografia

• [1] PODOWSKI M.Z. AND KUMBARO A.: The modeling of thin liquid films along inclined surfaces, J. Fluids Engineering, Vol. 126(2004), 565-572.
• [2] VAFAEI S. AND PODOWSKI M.Z.: Analysis of the relationship between liquid droplet size and contact angle, Advances in Colloid and Interface Science, Vol. 113(2005), 133-146.
• [3] GAYDOS J. AND NEUMANN A.W.: The dependence of contact angles on drop size and line tension, J. Colloid and Interface Science, Vol. 120(1987), 76-86.
• [4] VAFAEI S. AND PODOWSKI M.Z.: Theoretical analysis on the effect of liquid droplet geometry on contact angle, Nucl. Eng. Des., Vol. 235, Issues 10-12 (2005), 1293-1301.
• [5] PODOWSKI M.Z. AND ANTAL S.: Multidimensional modeling of annular flows in complex geometries and BWR fuel assemblies, Proc. Tenth Int. Topical Meeting on Nuclear Reactor Thermal Hydraulics (NURETH-10), Seoul, Korea, 2003.
• [6] ANTAL S. P., ETTORRE S. M., KUNZ R. F., PODOWSKI M. Z.: Development of a next generation computer code for the prediction of multicomponent multiphase Hows, Proc. Int. Meeting on Trends in Numerical and Physical Modeling for Industrial Multiphase Flow, Cargese, France, 2000.
• [7] WURZ J.: An experimental and theoretical investigation of annular steam-water flow in tubes and annuli at 30 to 90 bar, RISO National Laboratory Report No. 372, 1978.
• [8] GERSEY C.O. AND MUDAWAR I.: Effects of heater length and orientation on the trigger mechanism for near-saturated How boiling critical heat flux; I. Photographic study and statistical characterization of the near-wall interfacial features, Int. J. Heat Mass Transfer, Vol. 36(1995).
• [9] HINO R. AND UEDA T.: Studies on heat transfer and Bow characteristics in sub-cooled flow boiling - Part 2. Flow characteristics, Int. J. Multiphase Flow (1995).
• [10] PODOWSKI M.Z. AND ANTAL S.P.: CFD predictions of temperature excursion (CHF) in low-quality boiling in heated channels, Proc. Twelfth Int. Heat Transfer Conference, Grenoble, France, 2002.
• [11] TIWARI P., ANTAL S.P. AND PODOWSKI M.Z.: On the modeling of dispersed particulate Bows using a multifield model, [in:] Computational Solids and Fluids Mechanics 2003 (ed. K.J. Bathe), Elsevier Science LTD, 2003.
• [12] ANGLART H. AND PODOWSKI M.Z.: Fluid mechanics of Taylor bubbles and slug flows in vertical channels, Nuclear Science & Engineering, Vol. 140 (2002), No. 2, 165-172.
• [13] PODOWSKI M. Z., ANTAL S. P., TIWARI P. AND WIERZBICKI B. Z.: Development of mechanistic models of two-phase Bows for the NPHASE code, Interim Report for USNRC, RPI, 2004.
• [14] PODOWSKI M. Z., ANTAL S. P., ANGLART H. AND NAGRATH S.: Development of mechanistic modeling capabilities for computer simulations of reactor components and systems, Report for USNRC, RPI, 2001.
• [15] SEEGER W.: Experimental investigations of pressure and mass flow rate distribution in two-phase flow through T junctions, KfK-3876, Kernforschungszentrum-Karlsruhe, 1985 (in German).