![](/images/graphics-bg.png)
تأثير الاهتزاز المسلط على انتقال الحرارة بالحمل الحراري الحر داخل حيز مربع
Other Title(s)
The effect of vibration on natural convection heat transfer in an enclosed square cavity
Joint Authors
خضير، بيداء خليل
عادل محمود صالح
Source
المجلة العراقية للهندسة الميكانيكية و هندسة المواد
Issue
Vol. 20, Issue 4 (31 Dec. 2020), pp.282-307, 26 p.
Publisher
University of Babylon College of Engineering
Publication Date
2020-12-31
Country of Publication
Iraq
No. of Pages
26
Main Subjects
Topics
Abstract EN
A numerical investigation has been implemented to elucidate the effect of vertical and horizontal vibration at normal gravity on natural convection in a square enclosure filled with air at Rayleigh number 7× 107 and 4× 108 .
The enclosure was comprised of two vertical and opposed surfaces (the right hot and the left cold) while the two other surfaces are adiabatic.
The two-dimensional, low-Reynolds number k − ? turbulence model is applied to enable it to cope with low Reynolds number flows.
By transforming the equation of (continuity, Navier-Stokes and energy) using finite volume method from differential forms to algebraic forms using SIMPLE algorithm with hybrid scheme dealing with the time term are adopted to solve the governing equations.
A computer program in Fortran 90 was built to carry on the numerical solution.
Three cases were studied in this work, case I(reaches to steady state and then begins the effect of vibration at each frequency), caseII and caseIII(begin the effect of vibration from the transient at ascending and descending frequencies respectively).After the validity of the present code by comparing results with these of previous study for similar conditions, solutions have been obtained for Prandtle number of 0.7, aspect ratio (A=1).
In the high Rayleih number case (Ra=4× 108 ), the gravitional thermal convection dominates, and the vibration motion does not enhances the heat transfer remarkably.
In contrast, in low Rayleigh (Ra=7× 107 ), the vibration thermal convection is dominant, and the vibration enhaces the heat transfer rate significantly.
The effect of vertical directional vibration is more powerful in caseII(ascending frequency), when the horizontal directional vibration more effective in case III(descending frequency).
American Psychological Association (APA)
عادل محمود صالح وخضير، بيداء خليل. 2020. تأثير الاهتزاز المسلط على انتقال الحرارة بالحمل الحراري الحر داخل حيز مربع. المجلة العراقية للهندسة الميكانيكية و هندسة المواد،مج. 20، ع. 4، ص ص. 282-307.
https://search.emarefa.net/detail/BIM-1221000
Modern Language Association (MLA)
عادل محمود صالح وخضير، بيداء خليل. تأثير الاهتزاز المسلط على انتقال الحرارة بالحمل الحراري الحر داخل حيز مربع. المجلة العراقية للهندسة الميكانيكية و هندسة المواد مج. 20، ع. 4 (كانون الأول 2020)، ص ص. 282-307.
https://search.emarefa.net/detail/BIM-1221000
American Medical Association (AMA)
عادل محمود صالح وخضير، بيداء خليل. تأثير الاهتزاز المسلط على انتقال الحرارة بالحمل الحراري الحر داخل حيز مربع. المجلة العراقية للهندسة الميكانيكية و هندسة المواد. 2020. مج. 20، ع. 4، ص ص. 282-307.
https://search.emarefa.net/detail/BIM-1221000
Data Type
Journal Articles
Language
Arabic
Notes
يتضمن مراجع ببليوجرافية : ص. 306-307
Record ID
BIM-1221000