Abstract
The present paper deals with the numerical investigation of a 2D laminar fluid flow and heat transfer in a plane channel with two square blocks located at arbitrary positions. The numerical model is based on a coupling between the multiple relaxation time-lattice Boltzmann equation and the finite difference method for incompressible flow. Both the horizontal and the vertical separation distances between the two blocks are varied. Particular attention was paid to the distribution patterns of the time averaged local Nusselt number on the top and bottom walls. Results obtained from the present study show a complex flow patterns developed in the channel due to the change of the square blocks positions.
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Abbreviations
- g :
-
Gravitational acceleration (m s−1)
- d :
-
Blocks height (m)
- d h :
-
Block separation distance in X direction (m)
- d V :
-
Block separation distance in Y direction ( m)
- H :
-
Channel height (m)
- k :
-
Thermal conductivity (W m−1 K−1)
- L :
-
Length of the channel (m)
- <Nu> :
-
Time averaged local Nusselt number
- Pr :
-
Prandtl number (v/α)
- Re :
-
Channel Reynolds number (ρU max H/μ)
- T :
-
Temperature (K)
- u, v :
-
Velocity components (m s−1)
- U max :
-
Maximum velocity at the channel inlet (m s−1)
- x, y :
-
Cartesian coordinates
- X, Y :
-
Dimensionless coordinates (X = x/H, Y = y/H)
- α :
-
Thermal diffusivity (m2 s−1)
- β:
-
Blockage ratio (d/H)
- θ :
-
Dimensionless temperature (T − T c)/(T h− T c)
- ρ :
-
Density of fluid (kg m−3)
- μ :
-
Dynamic viscosity of fluid (kg m−1 s−1)
- v :
-
Kinematic viscosity (m2 s−1)
- τ :
-
Time nondimensionalized by U max/H
- c:
-
Cold
- f:
-
Fluid
- h:
-
Hot
- s:
-
Inner solid
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Moussaoui, M.A., Jami, M., Mezrhab, A. et al. Convective heat transfer over two blocks arbitrary located in a 2D plane channel using a hybrid lattice Boltzmann-finite difference method. Heat Mass Transfer 45, 1373–1381 (2009). https://doi.org/10.1007/s00231-009-0514-9
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DOI: https://doi.org/10.1007/s00231-009-0514-9