Numerical and experimental study of a two-phase flow with condensation in a microchannel

• Autorzy: Simon H. , Coulon N. , Nahas G.
• Języki publikacji: EN

Abstrakty

EN

A two-phase homogeneous model for the one-dimensionnal flow of an air-steam mixture in a microchannel with condensation and thermal coupling with the channel wails has been developped in the Finite Element code CAST3M. Experiments on a microchannel 50 cm long, with 50, 100 and 140 urn have been performed, for mass fraction of steam between 0.7 to 0.96. Comparison between experimental and numerical results has shown a good agreement for the total mass flow rate for channel openings of 100 fim and 140 um. An overheating of the internal surfaces of the channel was observed. For the 50 um opening, the calculation gives a 50% estimate of the experimental total mass flow rate. We point out the hypothesis contained in this simple model in order to explain the results.

Słowa kluczowe

EN

microchannel; two-phase flow; condensation

PL

mikrokanał; przepływ dwufazowy; kondensacja

• Wydawca: Wydawnictwo Politechniki Częstochowskiej
• Czasopismo: Turbulence : international journal
• Rocznik: 2004
• Tom: Vol. 10
• Strony: 139--146
• Opis fizyczny: Bibliogr. 8 poz.

Twórcy

autor

Simon H.

• CEA Saclay, DEN/DM2S/SFME/LTMF 91191 Gif sur Yvette Cedex France

autor

Coulon N.

• CEA Saclay, DEN/DM2S/SFME/LTMF 91191 Gif sur Yvette Cedex France

autor

Nahas G.

Bibliografia

• 1. Caroli C., Coulon N., Morton D.A.V., Williams M.M.R., Theoretical and experimental investigations on the leakage of steam, gas and aerosol s through narrow cracks and capillaries, FISA 95 - EU research on severe accidents 1995.
• 2. Verpeaux P., Millard A, Charras T., Combescure A, A modern approach of large computer codes for structural analysis, Proc. SMIRT, Los Angeles 1989.
• 3. Verpeaux P., Charras T., Millard A., Calcul des structures et intelligence artificielle, eds J.M. Fouet, P. Ladeveze, R. Ohayon Pluralis 1998.
• 4. Paillere H., Magnaud J.P., 10th Int. Conf. On Finite Elements in Fluids 1998.
• 5. Touret J.P., Valfort J.L., Containment evaluation under severe accident - CESA - final report, EDF/SEPTEN 2000.
• 6. Simon H., Coulon N., Tomassian R., Nahas G., A model for two-phase flow through small opening cracks, 4th European Thermal Sciences Conference, Birmingham 2004.
• 7. Hetsroni G., Handbook of multiphase systems, McGraw Hill Book Company 1982.
• 8. Collier J.G., Convective boiling and condensation, McGraw Hill Book Company 1981.