Influence of periodic temperature on transient natural convection flow of an elastico-viscous fluid past a uniformly accelerated plate

2009 ◽  
Vol 82 (3) ◽  
pp. 476-487
Author(s):  
R. C. Chaudhary ◽  
Arpita Jain
Keyword(s):  
Natural Convection ◽  
Viscous Fluid ◽  
Convection Flow ◽  
Natural Convection Flow ◽  
Transient Natural Convection ◽  
Periodic Temperature

scholarly journals Natural Convection Flow near a Vertical Plate that Applies a Shear Stress to a Viscous Fluid

PLoS ONE ◽  
2013 ◽  
Vol 8 (11) ◽  
pp. e78352 ◽  
Author(s):  
Qammar Rubbab ◽  
Dumitru Vieru ◽  
Corina Fetecau ◽  
Constantin Fetecau
Keyword(s):  
Shear Stress ◽  
Natural Convection ◽  
Viscous Fluid ◽  
Vertical Plate ◽  
Convection Flow ◽  
Natural Convection Flow

Transient natural convection flow between vertical concentric cylinders heated/cooled asymmetrically

2018 ◽  
Vol 232 (7) ◽  
pp. 926-939 ◽  
Author(s):  
Basant K Jha ◽  
Michael O Oni
Keyword(s):  
Natural Convection ◽  
Buoyancy Force ◽  
Distribution Parameter ◽  
Convection Flow ◽  
Force Distribution ◽  
Natural Convection Flow ◽  
Transient Natural Convection ◽  
Riemann Sum ◽  
Concentric Cylinders ◽  
The Impact

This paper investigates the impact of asymmetric heating or cooling of cylinder surfaces on transient natural convection flow in between vertical concentric cylinders. The outer surface of inner cylinder is assumed to be heated with temperature greater than the cooled inner surface of the outer cylinder. Closed form expressions are obtained by using the well-known Laplace transform technique to solve the governing partial differential equations in Laplace domain, whereas the Riemann-sum approximation is used to invert to time domain. Results show that the role of buoyancy force distribution parameter is to increase temperature, velocity, skin-friction and volume flow rate for both air and water. Further, reverse flow formation can be controlled by using suitable buoyancy force distribution parameter.

Aspect Ratio Effect on Natural Convection Flow in a Cavity Submitted to a Periodical Temperature Boundary

2006 ◽  
Vol 129 (8) ◽  
pp. 1060-1068 ◽  
Author(s):  
Nader Ben Cheikh ◽  
Brahim Ben Beya ◽  
Taieb Lili
Keyword(s):  
Heat Transfer ◽  
Natural Convection ◽  
Aspect Ratio ◽  
Vertical Wall ◽  
Heated Wall ◽  
Convection Flow ◽  
Natural Convection Flow ◽  
Temperature Boundary ◽  
Shallow Cavities ◽  
Periodic Temperature

The effect of aspect ratio on natural convection flow in a cavity submitted to periodic temperature boundary, is investigated numerically. The temperature of the heated wall is either maintained constant or varied sinusoidally with time while the temperature of the opposite vertical wall is maintained constant. The results are given for a range of varied parameters as Rayleigh number (5×103⩽Ra⩽106), cavity aspect ratio (1∕6⩽A⩽8), and period of the sinusoidally heated wall (1⩽τ⩽1600). The amplitude of oscillation (a=0.8) and the Prandtl number (Pr=0.71) were kept constant. The results obtained in the steady state regime show that the heat transfer averaged over the cold wall is maximum when the aspect ratio is in the range 1⩽A⩽2. In the case of a periodic temperature boundary, it is shown that the deviation between the mean heat transfer and the heat transfer of the constant heated case is larger for shallow cavities.

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