Influence of Uniform Suction/Injection on Heat Transfer of MHD Hiemenz Flow in Porous Media

2012 ◽  
Vol 138 (1) ◽  
pp. 82-88 ◽  
Author(s):  
E. Ghasemi ◽  
Soheil Soleimani ◽  
A. Barari ◽  
H. Bararnia ◽  
G. Domairry
Keyword(s):  
Heat Transfer ◽  
Porous Media ◽  
Flow In Porous Media ◽  
Uniform Suction ◽  
Hiemenz Flow

Symbolic Solution to Magnetohydrodynamic Hiemenz Flow in Porous Media

2008 ◽  
pp. 213-223
Author(s):  
Seripah Awang Kechil ◽  
Ishak Hashim
Keyword(s):  
Porous Media ◽  
Flow In Porous Media ◽  
Hiemenz Flow

Heat transfer analysis of a ventilated room with a porous partition: LB-MRT simulations

2020 ◽  
Vol 91 (2) ◽  
pp. 20904
Author(s):  
Zouhira Hireche ◽  
Lyes Nasseri ◽  
Djamel Eddine Ameziani
Keyword(s):  
Heat Transfer ◽  
Porous Media ◽  
Natural Convection ◽  
Reynolds Numbers ◽  
Darcy Number ◽  
The Other ◽  
Flow In Porous Media ◽  
Heat Transfer Analysis ◽  
Maximum Deviation ◽  
Important Conclusion

This article presents the hydrodynamic and thermal characteristics of transfers by forced, mixed and natural convection in a room ventilated by air displacement. The main objective is to study the effect of a porous partition on the heat transfer and therefore the thermal comfort in the room. The fluid flow future in the cavity and the heat transfer rate on the active wall have been analyzed for different permeabilities: 10−6 ≤ Da ≤ 10. The other control parameters are obviously, the Rayleigh number and the Reynolds number varied in the rows: 10 ≤ Ra ≤ 106 and 50 ≤ Re ≤ 500 respectively. The transfer equations write were solved by the Lattice Boltzmann Multiple Relaxation Time method. For flow in porous media an additional term is added in the standard LB equations, to consider the effect of the porous media, based on the generalized model, the Brinkman-Forchheimer-extended Darcy model. The most important conclusion is that the Darcian regime start for small Darcy number Da < 10−4. Spatial competition between natural convection cell and forced convection movement is observed as Ra and Re rise. The effect of Darcy number values and the height of the porous layer is barely visible with a maximum deviation less than 7% over the ranges considered. Note that the natural convection regime is never reached for low Reynolds numbers. For this Re values the cooperating natural convection only improves transfers by around 10% while, for the other Reynolds numbers the improvement in transfers due to natural and forced convections cooperation is more significant.

Experimental Study of Internal Forced Convection of Ferrofluid Flow in Porous Media

2014 ◽  
Vol 348 ◽  
pp. 139-146 ◽  
Author(s):  
Ashkan Sehat ◽  
Hani Sadrhosseini ◽  
M. Behshad Shafii
Keyword(s):  
Magnetic Field ◽  
Heat Transfer ◽  
Experimental Study ◽  
Porous Media ◽  
Temperature Distribution ◽  
Pressure Drop ◽  
Forced Convection ◽  
Volume Fraction ◽  
Flow In Porous Media ◽  
Tetra Methyl Ammonium Hydroxide

This work presents an experimental study of the effect of a magnetic field on laminar forced convection of a ferrofluid flowing in a tube filled with permeable material. The walls of the tube are subjected to a uniform heat flux and the permeable bed consists of uniform spheres of 3-mm diameter. The ferrofluid synthesis is based on reacting iron (II) and iron (III) in an aqueous ammonia solution to form magnetite, Fe3O4. The magnetite is mixed with aqueous tetra methyl ammonium hydroxide, (CH3)4NOH, solution. The dependency of the pressure drop on the volume fraction, and comparison of the pressure drop and the temperature distribution of the tube wall is studied. Also comparison of the wall temperature distribution, convection heat transfer coefficient and the Nusselt numbers of ferrofluids with different volume fractions is investigated for various Reynolds numbers (147 < Re < 205 ). It is observed that the heat transfer is enhanced by using a porous media, increasing the volume fraction had a similar effect. The pressure coefficient decreases for higher Reynolds number. The effect of magnetic field in four strategies, named modes, on ferrofluid flow through the porous media is presented.

Review of convection heat transfer and fluid flow in porous media with nanofluid

2015 ◽  
Vol 41 ◽  
pp. 715-734 ◽  
Author(s):  
Raed Abed Mahdi ◽  
H.A. Mohammed ◽  
K.M. Munisamy ◽  
N.H. Saeid
Keyword(s):  
Heat Transfer ◽  
Porous Media ◽  
Fluid Flow ◽  
Convection Heat Transfer ◽  
Flow In Porous Media ◽  
Convection Heat

Regularized lattice Bhatnagar–Gross–Krook model for the thermal flow in porous media

2017 ◽  
Vol 232 (3) ◽  
pp. 405-415 ◽  
Author(s):  
Zuo Wang ◽  
Jiazhong Zhang ◽  
Yan Liu ◽  
Le Wang
Keyword(s):  
Heat Transfer ◽  
Porous Media ◽  
Numerical Stability ◽  
Present Model ◽  
Flow In Porous Media ◽  
Thermal Flow ◽  
Representative Element ◽  
Flow And Heat Transfer ◽  
Representative Element Volume ◽  
Good Agreement

A regularized lattice Bhatnagar–Gross–Krook model for flow and heat transfer in porous media at the representative element volume scale is presented. In the model, the regularization process is extended to the existing Darcy–Forchheimer-based lattice Bhatnagar–Gross–Krook scheme. Numerical results show good agreement between the present model and the previous ones. Also, the present model shows better numerical stability than its lattice Bhatnagar–Gross–Krook counterpart.

scholarly journals A comparative study of different heat transfer enhancement mechanisms in a partially porous pipe

2021 ◽  
Vol 3 (10) ◽  
Author(s):  
Nima Fallah Jouybari ◽  
Majid Eshagh Nimvari ◽  
Wennan Zhang
Keyword(s):  
Heat Transfer ◽  
Porous Media ◽  
Porous Material ◽  
Porous Layer ◽  
Heat Transfer Performance ◽  
Pipe Wall ◽  
Critical Role ◽  
Flow In Porous Media ◽  
Turbulent Regime ◽  
Transfer Performance

AbstractThe effect of porous material position on the heat transfer inside a pipe working in a turbulent regime is studied here to obtain a detailed understanding of the heat transfer enchantment mechanisms in different porous substrate positions. To this end, an in-house Fortran code is developed to solve the governing equations using the finite volume method and SIMPLE algorithm. Turbulent flow in porous media is modeled using a modified version of k–ε model. The flow field and heat transfer inside the partially filled pipe are investigated for the two cases of central and boundary configurations. The porous and flow characteristics including Reynolds number, Darcy number, the conductivity ratios of solid to fluid and the thickness of inserted porous layer are varied and the heat transfer performance is studied in different cases. It is observed that two entirely different phenomena enhance the heat transfer in central and boundary configurations. While the channeling of fluid between the porous media and the pipe wall highly affects the heat transfer performance in the former, the thermal conductivity of porous media plays a highly critical role in the latter configuration. It is shown that, for the same filling ratio, inserting the porous layer at the core of the pipe is more effective than placing it at the wall. Investigating porous materials with different solid conductivities revealed that covering the pipe wall with a porous material is justified only for solid matrixes with high thermal conductivities.

B101 Heat Transfer and Fluid Flow in Porous Media

2001 ◽  
Vol 2001 (0) ◽  
pp. 53-58
Author(s):  
Takashi Masuoka
Keyword(s):  
Heat Transfer ◽  
Porous Media ◽  
Fluid Flow ◽  
Flow In Porous Media

Conjugate heat transfer during oscillatory laminar flow in porous media

2013 ◽  
Vol 66 ◽  
pp. 23-30 ◽  
Author(s):  
M.G. Pathak ◽  
T.I. Mulcahey ◽  
S.M. Ghiaasiaan
Keyword(s):  
Heat Transfer ◽  
Porous Media ◽  
Laminar Flow ◽  
Conjugate Heat Transfer ◽  
Flow In Porous Media
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