Effects of width-to-depth ratio on heat transfer coefficient for gap. Issue 4 (5th May 2015)

• Record Type: Journal Article
• Authors: Huang, Haiming; Huang, Guo
• Is Part Of: International journal of numerical methods for heat & fluid flow. Volume 25:Issue 4(2015)
• Page Start: 803
• Page End: 809
• Publication Date: 2015-05-05
• Subjects: Heat -- Transmission -- Mathematics -- Periodicals; Fluid dynamics -- Mathematics -- Periodicals; 536.2
• DOI: 10.1108/HFF-05-2014-0143
• Languages: English
• ISSNs: 0961-5539

Abstract

<abstract> <title> <x content-type="archive" xml:space="preserve">Abstract</x> </title> <sec> <title content-type="abstract-heading">Purpose</title> <p> – The purpose of this paper is to perform the stimulation in order to examine the effects on the heat transfer coefficient and the flowfield properties at the vicinity of the gap due to variations in the width-to-depth ratio. </p> </sec> <sec> <title content-type="abstract-heading">Design/methodology/approach</title> <p> – The governing equations were discreted by using the finite volume method, and based on pressure-velocity coupled algorithm, the heat transfer coefficients outside and inside the gaps, defined by the width-to-depth ratio of 1, 2/3, 1/2, 1/3 and 1/4, were obtained by the Fluent software. </p> </sec> <sec> <title content-type="abstract-heading">Findings</title> <p> – The number of vortex inside the gap depends on the width-to-depth ratio, and the maximum value of the heat transfer coefficient emerges on the downstream surface. </p> </sec> <sec> <title content-type="abstract-heading">Originality/value</title> <p> – The study gives a feasible method to simulate the flowfield and the heat transfer inside the gap, which will help the design of the thermal protection system for reentry vehicles.</p> </sec> </abstract>