Free convection in a trapezoidal enclosure divided by a flexible partition

2020 ◽  
Vol 149 ◽  
pp. 119186 ◽  
Author(s):  
S.A.M. Mehryan ◽  
Mohammad Ghalambaz ◽  
Reza Kalantar Feeoj ◽  
Ahmad Hajjar ◽  
Mohsen Izadi
Keyword(s):  
Free Convection ◽  
Trapezoidal Enclosure

scholarly journals Effects of porosity and heat generation on free convection in a porous trapezoidal cavity

2019 ◽  
Vol 23 (3 Part B) ◽  
pp. 1801-1811 ◽  
Author(s):  
Mohamed Mousa
Keyword(s):  
Heat Transfer ◽  
Finite Element Analysis ◽  
Porous Medium ◽  
Free Convection ◽  
Heat Generation ◽  
Internal Heat ◽  
Internal Heat Generation ◽  
Element Analysis ◽  
Trapezoidal Enclosure ◽  
The Right

The problem of laminar free convection in a trapezoidal enclosure, filled with a fluidsaturated porous medium and with internal heat generation has been investigated using a penalty finite element analysis. The enclosure bottom wall is heated at a constant temperature and the top wall is subjected to a constant cold temperature whereas the left inclined wall is considered to be non-isothermal and the right inclined wall is isothermally cooled. The effects of the porosity of the medium and heat generation on the isotherms and streamlinesare investigated. The rate of heat transfer from the walls of the cavity is examined as well. The Prandtl number of the fluid is chosen to be 0.7 (air) whereas the value of the Rayleigh number is selected to be 105.

scholarly journals Computational study of laminar free convection inside tilting irregular cavity of a batch-type solar collector

2021 ◽  
pp. 78-78
Author(s):  
Fahad Butt ◽  
Abdul Badar ◽  
Ajaz Janjua ◽  
Salman Siddiqui
Keyword(s):  
Free Convection ◽  
Tilt Angle ◽  
Solar Collector ◽  
Computational Study ◽  
Batch Type ◽  
Side Walls ◽  
Trapezoidal Enclosure ◽  
Correlation Trend ◽  
Solar Thermal System ◽  
Rayleigh Numbers

Batch-type solar collector is a tilt-able water-heating solar-thermal system comprising an isosceles-trapezoidal enclosure housing a circular-cylinder absorber at the bottom wall, insulated side-walls, and flat-top glazing. Free convection of air inside such trapezoidal enclosure is studied numerically by varying the tilt angle of the whole enclosure from 0o-70o. The influence of tilt on the flow field has been demonstrated by plotting the streamlines and isotherms. The present study successfully identifies the importance of enclosure-tilt in quantifying heat-loss between absorber and glazing by developing a computational correlation between Nusselt and Rayleigh as a function of tilt. The correlation trend is non-monotonic over the range of angular Rayleigh numbers numerically experimented with having a peak around angular Rayleigh number 3?105 corresponding to the tilt-angle 30 degrees. The irregular-shaped cavity implies that the heat-transfer correlations already existing for regular-shaped cavities may not be used otherwise they will draw implausible conclusions and this argument identifies the novelty of the present study.

Time-dependent hydromagnetic free convection nanofluid flows within a wavy trapezoidal enclosure

2017 ◽  
Vol 115 ◽  
pp. 363-377 ◽  
Author(s):  
Victor M. Job ◽  
Sreedhara Rao Gunakala ◽  
B. Rushi Kumar ◽  
R. Sivaraj
Keyword(s):  
Free Convection ◽  
Time Dependent ◽  
Trapezoidal Enclosure

Temperature Measurement in Laminar Free Convection Using Electro-Optic Holography

1997 ◽  
Vol 7 (9) ◽  
pp. 1893-1898 ◽  
Author(s):  
G. Schirripa Spagnolo ◽  
D. Ambrosini ◽  
A. Ponticiello ◽  
D. Paoletti
Keyword(s):  
Free Convection ◽  
Temperature Measurement ◽  
Electro Optic

Free convection in geophysical processes

1983 ◽  
Vol 141 (10) ◽  
pp. 311 ◽  
Author(s):  
V.V. Alekseev ◽  
A.M. Gusev
Keyword(s):  
Free Convection ◽  
Geophysical Processes
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