Computation of wall heat transfer in pipe-expansion flows with/without swirl

Keh-Chin Chang; Wen Der Hsieh

Computation of wall heat transfer in pipe-expansion flows with/without swirl

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Abstract

Computation of wall heat transfer in pipe-expansion flows with/without swirl motion is implemented using a new tow-layer (hybrid) turbulence model which is composed of a Reynolds stress model (RSM) and a Low-Reynolds-number (LRN) k - ε model. Comparisons of the predicted distributions of the Nusselt number along the wall with the available experimental results reveal that this two-layer turbulence model yields satisfactory performances in the three test cases. It is also shown that appreciable superiority of this two-layer turbulence model over a pure LRN k - ε model is observed when the investigated flow becomes more complex (anisotropic) such as the recirculating swirling flow case.

Original language	English
Pages (from-to)	131-138
Number of pages	8
Journal	American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD
Volume	357
Issue number	2
Publication status	Published - 1998

All Science Journal Classification (ASJC) codes

Mechanical Engineering
Fluid Flow and Transfer Processes

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abstract = "Computation of wall heat transfer in pipe-expansion flows with/without swirl motion is implemented using a new tow-layer (hybrid) turbulence model which is composed of a Reynolds stress model (RSM) and a Low-Reynolds-number (LRN) k - ε model. Comparisons of the predicted distributions of the Nusselt number along the wall with the available experimental results reveal that this two-layer turbulence model yields satisfactory performances in the three test cases. It is also shown that appreciable superiority of this two-layer turbulence model over a pure LRN k - ε model is observed when the investigated flow becomes more complex (anisotropic) such as the recirculating swirling flow case.",

author = "Keh-Chin Chang and Hsieh, {Wen Der}",

year = "1998",

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pages = "131--138",

journal = "American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD",

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T1 - Computation of wall heat transfer in pipe-expansion flows with/without swirl

AU - Chang, Keh-Chin

AU - Hsieh, Wen Der

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AB - Computation of wall heat transfer in pipe-expansion flows with/without swirl motion is implemented using a new tow-layer (hybrid) turbulence model which is composed of a Reynolds stress model (RSM) and a Low-Reynolds-number (LRN) k - ε model. Comparisons of the predicted distributions of the Nusselt number along the wall with the available experimental results reveal that this two-layer turbulence model yields satisfactory performances in the three test cases. It is also shown that appreciable superiority of this two-layer turbulence model over a pure LRN k - ε model is observed when the investigated flow becomes more complex (anisotropic) such as the recirculating swirling flow case.

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