A NUMERICAL STUDY OF STEADY AND UNSTEADYFLOW AND HEAT TRANSFER FROM A CONFINED SLOT JET IMPINGING ON A CONSTANT HEAT FLUX WALL

Authors

  • D. U. Lawal Department of Mechanical Engineering, King Fahd University of Petroleum & Minerals, Dhahran, 31261, Saudi Arabia
  • A A Abu Bakar Department of Mechanical Engineering, King Fahd University of Petroleum & Minerals, Dhahran, 31261, Saudi Arabia
  • M. B. Alharbi Department of Mechanical Engineering, King Fahd University of Petroleum & Minerals, Dhahran, 31261, Saudi Arabia
  • R Ben-Mansour Department of Mechanical Engineering, King Fahd University of Petroleum & Minerals, Dhahran, 31261, Saudi Arabia

Abstract

Impinging jets have been used effectively in several applications including films and foods, rapid cooling and heating processes, tempering of glass and metal, drying of papers, coating, and freezing of tissue. In this work, a numerical simulation of steady and unsteady flow and heat transfer due to a confined 2-D slot jet impinging on constant heat flux plate is presented. Two cases of problem were considered. In the first case, jet-to-plate spacing was varied from 2 to 5 at a fixed jet Reynolds number of 500. In the second case, jet Reynolds number was varied from 200 to 750 at fixed jet-to-plate spacing of 5. In the steady regime, the stagnation Nusselt number was found to increase linearly with increasing Reynolds number, and the distribution of heat transfer in the wall jet region was found to be highly influenced by flow characteristics of the jet. A strong correlation between pressure distribution and Nusselt number was noticed. The critical Reynolds number at which the symmetry of the flow in the formation of vortex sheets is highly disrupted was determined. It was observed that, at the critical Reynolds number, the area-averaged heat transfer coefficient is high and influence the drastic changes of the Nusselt number in the unsteady regime.

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How to Cite

Lawal, D. U., Abu Bakar, A. A., Alharbi, M. B., & Ben-Mansour, R. (2015). A NUMERICAL STUDY OF STEADY AND UNSTEADYFLOW AND HEAT TRANSFER FROM A CONFINED SLOT JET IMPINGING ON A CONSTANT HEAT FLUX WALL. Journal of Mechanical Engineering and Technology (JMET), 6(2). Retrieved from https://jmet.utem.edu.my/jmet/article/view/359

Issue

Vol. 6 No. 2

Section

Others

License

JMET Copyright Principles
 
JMET seeks to retain copyright of the articles it publishes, without the authors giving up their right to use their own material.

Originality

The manuscript is neither been published before, nor is it under consideration for publication in any other journals. It contains no matter that is scandalous, obscene, libelous or otherwise contrary to law.

Terms of Acceptance 

When the article is accepted for publication, the authors shall hereby agree to transfer to the Journal of Mechanical Engineering and Technology, all rights, including those pertaining to electronic forms and transmissions, under existing copyright laws, except for the following, which the author(s) specifically retain(s):

 All proprietary right other than copyright, such as patent rights.

  1. The right to make further copies of all or part of the published article for my/our use in classroom teaching.
  2. The right to reuse all or part of this material in a compilation of my/our own works or in a textbook of which I/we am/are the author(s).
  3. The right to make copies of the published work for internal distribution within the institution that employs me/us.

The authors agree that copies made under these circumstances will continue to carry the copyright notice that appeared in the original published work. The authors agree to inform any co-authors, if any, of the above terms. The authors certify that they have obtained written permission for the use of text, tables, and/or illustrations from any copyrighted source(s), and they agree to supply such written permission(s) to Journal of Mechanical Engineering and Technology upon request.

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