Experimental investigation of hydrodynamics and heat transfer in conditions of free convection

Authors

  • Роман Володимирович Неїло National Technical University of Ukraine "Kyiv Polytechnic Institute" 37 Prospect Peremogy, Kiev, 03056, Ukraine

DOI:

https://doi.org/10.15587/2312-8372.2013.19642

Keywords:

heat transfer, free convection, horizontal tube, hydrodynamics, boundary layer, visualization

Abstract

The paper gives a generalization of the results of experimental investigation on heat transfer and hydrodynamics on the surface of horizontal cylinder in conditions of free convection, in the range of Rayleigh numbers . The results of the research are well generalized by the method described in [6], thus additional work carried out by the author on the analysis of the influence of a choice of the defining temperature also showed the appropriateness of using the recommendations [6]. Visualization of the dynamic boundary layer, which is formed around the heated cylinder, allows visual confirmation of the approaches used in the analysis of results (laminar flow, boundary layer theory, symmetry of the cylinder washing pattern with respect to the vertical plane of symmetry, laminar thermal trace development over the tube surface etc.). By changing the radial coordinate of the smoke stream supply, experimental determination of the approximate frontier of existence of the dynamic boundary layer is possible. The research results are in good agreement with the available data on heat transfer and hydrodynamics of the single cylinder in a large volume, in conditions of free convection.

Author Biography

Роман Володимирович Неїло, National Technical University of Ukraine "Kyiv Polytechnic Institute" 37 Prospect Peremogy, Kiev, 03056

PhD student

Department of  atomic electricity plant and engineering thermal physics

References

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Published

2013-12-23

How to Cite

Неїло, Р. В. (2013). Experimental investigation of hydrodynamics and heat transfer in conditions of free convection. Technology Audit and Production Reserves, 6(5(14), 31–33. https://doi.org/10.15587/2312-8372.2013.19642

Issue

Vol. 6 No. 5(14) (2013): Scientific outcomes 2013

Section

Power and energy saving

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Copyright (c) 2016 Роман Володимирович Неїло

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