scholarly journals Numerical simulation for laminar flow and heat transfer of gas in rectanglar micropassages with constant wall heat flux

2003 ◽  
Vol 39 (10) ◽  
pp. 843-848 ◽  
Author(s):  
Gang An ◽  
Jun-Ming Li ◽  
Bu-Xuan Wang
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
Heat Flux ◽  
Laminar Flow ◽  
Wall Heat Flux ◽  
Flow And Heat Transfer ◽  
Constant Wall Heat Flux

scholarly journals HEAT TRANSFER OF LAMINAR FLOW IN VERTICAL TUBES WITH CONSTANT WALL HEAT FLUX

1968 ◽  
Vol 1 (2) ◽  
pp. 120-124 ◽  
Author(s):  
NOBUO MITSUISHI ◽  
OSAMU MIYATAKE ◽  
MITSURU YANAGIDA
Keyword(s):  
Heat Transfer ◽  
Heat Flux ◽  
Laminar Flow ◽  
Wall Heat Flux ◽  
Constant Wall Heat Flux ◽  
Vertical Tubes

scholarly journals Axisymmetric stagnation-point flow and heat transfer of nanofluid impinging on a cylinder with constant wall heat flux

2019 ◽  
Vol 23 (5 Part B) ◽  
pp. 3153-3164 ◽  
Author(s):  
Hamid Mohammadiun ◽  
Vahid Amerian ◽  
Mohammad Mohammadiun ◽  
Iman Khazaee ◽  
Mohsen Darabi ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Heat Flux ◽  
Velocity Field ◽  
Stagnation Point ◽  
Base Fluid ◽  
Fluid Velocity ◽  
Wall Heat Flux ◽  
Flow And Heat Transfer ◽  
Constant Wall Heat Flux ◽  
Fluid Velocity Field

The steady-state, viscous flow and heat transfer of nanofluid in the vicinity of an axisymmetric stagnation point of a stationary cylinder with constant wall heat flux is investigated. The impinging free-stream is steady and with a constant strain rate, k ?. Exact solution of the Navier-Stokes equations and energy equation are derived in this problem. A reduction of these equations is obtained by use of appropriate transformations introduced in this research. The general self-similar solution is obtained when the wall heat flux of the cylinder is constant. All the previous solutions are presented for Reynolds number Re = k ?a2/2n f ranging from 0.1 to 1000, selected values of heat flux and selected values of particle fractions where a is cylinder radius and n f is kinematic viscosity of the base fluid. For all Reynolds numbers, as the particle fraction increases, the depth of diffusion of the fluid velocity field in radial direction, the depth of the diffusion of the fluid velocity field in z-direction, shear-stresses and pressure function decreases. However, the depth of diffusion of the thermal boundary-layer increases. It is clear by adding nanoparticles to the base fluid there is a significant enhancement in Nusselt number and heat transfer.

Laminar fully developed flow and heat transfer of Robertson–Stiff fluids in a rectangular duct

2005 ◽  
Vol 83 (2) ◽  
pp. 165-182 ◽  
Author(s):  
M E Sayed-Ahmed ◽  
A S El-Yazal
Keyword(s):  
Heat Transfer ◽  
Heat Flux ◽  
Wall Heat Flux ◽  
Physical Parameters ◽  
Rectangular Duct ◽  
Constant Wall Temperature ◽  
Fully Developed Flow ◽  
Flow And Heat Transfer ◽  
Power Law Fluids ◽  
Constant Wall Heat Flux

The laminar fully developed flow and heat transfer through a rectangular duct of a viscous incompressible Robertson–Stiff fluid is investigated. Robertson–Stiff fluids are time independent non-Newtonian materials possessing a yield value. The governing momentum and energy equations are solved numerically using finite-difference approximations. We consider two cases of thermal boundary conditions: H1 the "circumferentially constant wall temperature and axially constant wall heat flux" and H2 the "circumferentially and axially constant wall heat flux". The velocity, temperature, the average friction factor and Nusselt numbers for the two cases are computed for various values of the physical parameters. The present results have been compared with the known solutions for Newtonian and power-law fluids and are found to be in good agreement.PACS Nos.: 47.50.+d, 47.15.–x

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