Document Details

Document Type : Article In Journal 
Document Title :
Natural Convection in a Tilted Rectangular Enclosure with a Single Discrete Heater
انتقال الحرارة بالحمل الحر داخل وعاء مستطيل المقطع من مصدر تسخين محدود الأبعاد
 
Subject : Thermal Engineering 
Document Language : English 
Abstract : The effect of inclination angle on the steady laminar free convection in a rectangular enclosure (aspect ratio = 5), which is discretely heated by an isoflux flush mounted small heater (L / H = 0.125) is studied numerically. The local and average Nusselt numbers are compared at inclination angles from 0 (bottom heating) to 180? (top heating), for modified Rayleigh numbers 102 ? Ra* ? 106. The two-dimensional mass, momentum and energy equations with Boussinesq approximation are solved for the present configuration where the sidewalls are adiabatic and the heat sink is isothermal. Forward time central space implicit finite difference scheme is employed to solve the coupled governing equations. Numerical results demonstrate the strong dependence of streamlines and isotherms on both inclination angle and Rayleigh number. Unlike fully heated enclosures the end effects of the discrete concentrated heat source enhances convection and increases the average Nusselt number as compared to that for thermally full active wall. The effect of the orientation angle on the flow structure and associated transition between unicellular and multiple cell flow is presented. The maximum Nusselt number is found close to the vertical orientation while the minimum is at the horizontal position with fluid heated from the top for which convection is effectual and the average Nusselt number is greater than unity. 
ISSN : 1319-1047 
Journal Name : Engineering Sciences Journal 
Volume : 16 
Issue Number : 2 
Publishing Year : 1426 AH
2005 AD 
Number Of Pages : 19 
Article Type : Article 
Added Date : Sunday, October 11, 2009 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
على الباهيA. Al-BahiResearcher  
ماجد الحازمي M. Al-HazmyResearcher  
جلال زكيG. M. ZakiResearcher  

Files

File NameTypeDescription
 22999.pdf pdf 

Back To Researches Page