Numerical investigation of critical range for the occurrence of secondary peaks in the Nusselt distribution curve

The study of heat transfer augmentation in micro/nano scale and electronic packaging systems are some of the paramount areas of impending universe. In such systems the cooling of the hot heat sinks is generally achieved through the impingement of air jet. In order to study the characteristic of hea...

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Main Authors:	Mohammed Umair, Siddque, Alrobaian, Abdul Rahman, Khan, Sher Afghan, Gnanagonda Kashinath, Marthande, Rajesh, Patil
Format:	Article
Language:	English English
Published:	Penerbit Akademia Baru 2018
Subjects:	TJ255 Heat engines
Online Access:	http://irep.iium.edu.my/69073/ http://irep.iium.edu.my/69073/ http://irep.iium.edu.my/69073/1/69073_Numerical%20investigation%20of%20critical%20range.pdf http://irep.iium.edu.my/69073/2/69073_Numerical%20investigation%20of%20critical%20range_SCOPUS.pdf

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recordtype	eprints
spelling	iium-690732019-02-13T01:14:26Z http://irep.iium.edu.my/69073/ Numerical investigation of critical range for the occurrence of secondary peaks in the Nusselt distribution curve Mohammed Umair, Siddque Alrobaian, Abdul Rahman Khan, Sher Afghan Gnanagonda Kashinath, Marthande Rajesh, Patil TJ255 Heat engines The study of heat transfer augmentation in micro/nano scale and electronic packaging systems are some of the paramount areas of impending universe. In such systems the cooling of the hot heat sinks is generally achieved through the impingement of air jet. In order to study the characteristic of heat dissipation rate, variation of Nusselt number versus radial distance over the target surface is investigated. The magnitude of Nusselt Number is found to decrease gradually with increase in the radial distance away from the jet. The record of Nusselt magnitude over the radial distance is accomplished through computation using ANSYS CFX 14.5. A 2-D axis-symmetric model consisting of nozzle and target surface with discrete meshing is solved using an appropriate turbulence model, in order to develop the flow regime and record the necessary heat interactions. As far as the transition and intermediacy in flow structure at the target surface due to the un-predicted transport of shear stress is concerned, SST along with Gamma – Theta turbulence model is solved simultaneously in order to incorporate these phenomena.. The occurrence of such secondary peaks increases the heat transfer rate. Looking into the light of research area in determining the exact cause and the intervening range for the occurrence of such peaks, the current research focuses over the determination of the critical range within which the secondary peaks exists. This critical range comprises of multiple of jet to the target spacing and diameter-based Reynolds number and the corresponding critical range is between 2205 and 26, 46, 000. Not only that the velocity contour of the flow regime is mapped for the sets of parameters within the critical range. An empirical correlation for the area averaged Nusselt number terms of Reynolds number and jet to the target spacing being is proposed. This correlation improvises the calculation of the magnitude of area. Penerbit Akademia Baru 2018 Article PeerReviewed application/pdf en http://irep.iium.edu.my/69073/1/69073_Numerical%20investigation%20of%20critical%20range.pdf application/pdf en http://irep.iium.edu.my/69073/2/69073_Numerical%20investigation%20of%20critical%20range_SCOPUS.pdf Mohammed Umair, Siddque and Alrobaian, Abdul Rahman and Khan, Sher Afghan and Gnanagonda Kashinath, Marthande and Rajesh, Patil (2018) Numerical investigation of critical range for the occurrence of secondary peaks in the Nusselt distribution curve. CFD Letters, 10 (2). pp. 1-17. ISSN 2180-1363 http://www.akademiabaru.com/doc/CFDLV10_N2_P1_17.pdf
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English English
topic	TJ255 Heat engines
spellingShingle	TJ255 Heat engines Mohammed Umair, Siddque Alrobaian, Abdul Rahman Khan, Sher Afghan Gnanagonda Kashinath, Marthande Rajesh, Patil Numerical investigation of critical range for the occurrence of secondary peaks in the Nusselt distribution curve
description	The study of heat transfer augmentation in micro/nano scale and electronic packaging systems are some of the paramount areas of impending universe. In such systems the cooling of the hot heat sinks is generally achieved through the impingement of air jet. In order to study the characteristic of heat dissipation rate, variation of Nusselt number versus radial distance over the target surface is investigated. The magnitude of Nusselt Number is found to decrease gradually with increase in the radial distance away from the jet. The record of Nusselt magnitude over the radial distance is accomplished through computation using ANSYS CFX 14.5. A 2-D axis-symmetric model consisting of nozzle and target surface with discrete meshing is solved using an appropriate turbulence model, in order to develop the flow regime and record the necessary heat interactions. As far as the transition and intermediacy in flow structure at the target surface due to the un-predicted transport of shear stress is concerned, SST along with Gamma – Theta turbulence model is solved simultaneously in order to incorporate these phenomena.. The occurrence of such secondary peaks increases the heat transfer rate. Looking into the light of research area in determining the exact cause and the intervening range for the occurrence of such peaks, the current research focuses over the determination of the critical range within which the secondary peaks exists. This critical range comprises of multiple of jet to the target spacing and diameter-based Reynolds number and the corresponding critical range is between 2205 and 26, 46, 000. Not only that the velocity contour of the flow regime is mapped for the sets of parameters within the critical range. An empirical correlation for the area averaged Nusselt number terms of Reynolds number and jet to the target spacing being is proposed. This correlation improvises the calculation of the magnitude of area.
format	Article
author	Mohammed Umair, Siddque Alrobaian, Abdul Rahman Khan, Sher Afghan Gnanagonda Kashinath, Marthande Rajesh, Patil
author_facet	Mohammed Umair, Siddque Alrobaian, Abdul Rahman Khan, Sher Afghan Gnanagonda Kashinath, Marthande Rajesh, Patil
author_sort	Mohammed Umair, Siddque
title	Numerical investigation of critical range for the occurrence of secondary peaks in the Nusselt distribution curve
title_short	Numerical investigation of critical range for the occurrence of secondary peaks in the Nusselt distribution curve
title_full	Numerical investigation of critical range for the occurrence of secondary peaks in the Nusselt distribution curve
title_fullStr	Numerical investigation of critical range for the occurrence of secondary peaks in the Nusselt distribution curve
title_full_unstemmed	Numerical investigation of critical range for the occurrence of secondary peaks in the Nusselt distribution curve
title_sort	numerical investigation of critical range for the occurrence of secondary peaks in the nusselt distribution curve
publisher	Penerbit Akademia Baru
publishDate	2018
url	http://irep.iium.edu.my/69073/ http://irep.iium.edu.my/69073/ http://irep.iium.edu.my/69073/1/69073_Numerical%20investigation%20of%20critical%20range.pdf http://irep.iium.edu.my/69073/2/69073_Numerical%20investigation%20of%20critical%20range_SCOPUS.pdf
first_indexed	2023-09-18T21:38:01Z
last_indexed	2023-09-18T21:38:01Z
_version_	1777412951881285632

Numerical investigation of critical range for the occurrence of secondary peaks in the Nusselt distribution curve

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