Numerical study of drag reduction using micro bubbles in a vertical Couette-Taylor system

سال انتشار: 1390
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 772

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شناسه ملی سند علمی:

ICHEC07_042

تاریخ نمایه سازی: 25 فروردین 1394

چکیده مقاله:

This work focuses on studying the drag reduction due to the presence of micro-bubbles in a vertical Couette-Taylor system. The study was carried out numerically using a discrete phase model for a fully turbulent flow, which maximum Reω is up to 3000. Main flow is water and the airbubbles are injected constantly at the bottom of cylinder and rise through the flow. At the first stepthe bubbles distribution or bubbles pattern through the flow, that is acquired using numericalmethod, shows a good agreement with those found via the experimental data for all Reynoldsnumbers. The effect of injected air with constant flow rate on the drag reduction was studied usingvariation of friction coefficient which was calculated by the variation of shear stress on thecylinder surface. The results confirmed about 25% of drag reduction when micro bubbles wereinjected in the system. This reduction was the effect of the bubbles on the density of fluid and transformed momentum. Moreover, the acquired numerical results were in good agreement to those found in the previous experimental works

نویسندگان

r Maryami

Assistant professor, University of Sistan and Baluchestan

M H Shafiei Mayam

Assistant professor, University of Sistan and Baluchestan;

s Farahat

Assistant professor, University of Sistan and Baluchestan;

m JavadPour

Assistant professor, University of Sistan and Baluchestan;

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  • M. E.McCormick, R. Bhattacharyya, Drag reduction of a submersible hul ...
  • V.G. Bodgevich, A. R. Evseev, The distribution of skin friction ...
  • V.G. Bodgevich, A. R. Evseev, A. G. Mayyuga, G. S. ...
  • N. K. Madavan, S. Deutsch, C. L. Merkle, Reduction of ...
  • N. K. Madavan, C. L. Merkle, S. Deutsch, Numerical investigations ...
  • _ Chemical Engineering Congress & Exihibition Kish, Iran, 21-24 November, ...
  • S. Y. Kim, J. W. Cleaver, The persistence of drag ...
  • Y. Kodama, A. Kakugawa, T. Takahashi, H. Kawashima, Experimental study ...
  • S. Deutsch, J. Castano, icrobubble skin friction on _ axisymmetric ...
  • M. Lance, J. Bataille, Turbulence in the liquid phase of ...
  • S. Deutsch, A. A. Fontaine, The influence of the type ...
  • S. Pal, Turbulence characteristics and bubble dynamics of a microbubble ...
  • H. Kato, M. Miyanaga, Y. Haramoto, M. M. Guin, Frictional ...
  • A. Kanai, H. Miyata, Direct numerical simulation of wall turbulent ...
  • J. Xu, M. R. Maxey, G. E. Karniadakis, Numerical simulation ...
  • A. Kitagawa, K. Sugiyama, M. Ashihara, K. Hishida, Y. Kodama, ...
  • M. Couette, Etudes sur le frottement des liquides, Ann.Chim. Phys., ...
  • A. Mallock, Experiments _ fluid viscosity. Phil Trans R Soc ...
  • G. I. Taylor, Stability of a viscous liquid contained between ...
  • J. A. Cornish, Flow of water through fine clearances with ...
  • S. Goldstein, The stability of viscous fluid flow between rotating ...
  • S. Chandras ekhar, The hydrodynamic stability of viscous flow between ...
  • R. C. Di Prima, The stability of a viscous fluid ...
  • R. J. Domnelly, D. Fultz, Experiments on the stability of ...
  • Y. Shiomi, H. Kutsuna, K. Akagawa, M. Ozawa, Two-phase flow ...
  • R. Hubacz, S. Wronski, Horizontal C ouette-Taylor flow in a ...
  • K. Arkhen, J. Fontaine, J. E. Wesfreid, Highly turbulent C ...
  • Van den Berg, T. H., Luther, S., Lathrop, D. and ...
  • T. H. van den Berg, D. P. M. van Gils, ...
  • Y. Murai, H. Oiwa, Y. Takeda, Frictional drag reduction in ...
  • X. Shen, S. L. Ceccio, M. Perlin, Influence of bubble ...
  • H. Lamb, Hydrodynamic S, Sixth Edition. Dover Publications, New York, ...
  • _ Chemical Engineering Congress & Exihibition Kish, Iran, 21-24 November, ...
  • نمایش کامل مراجع