On the Hydrodynamics and Heat convection of an Impinging External Flow upon a cylinder with Transpiration and Embedded in a Porous Medium
سال
: 2017
چکیده: This paper extends the existing studies of heat convection by an external flow
impinging upon a flat porous insert to that on a circular cylinder inside a porous medium.
The surface of the cylinder is subject to constant temperature and can include uniform or
non-uniform transpiration. These cylindrical configurations are introduced in the analyses
of stagnation-point flows in porous media for the first time. The equations governing steady
transport ofmomentum and thermal energy in porous media are reduced to simpler nonlinear
differential equations and subsequently solved numerically. This reveals the dimensionless
velocity and temperature fields of the stagnation-point flow, as well as theNusselt number and
shear stress on the surface of the cylinder. The results showthat transpiration on the surface of
the cylinder and Reynolds number of the external flow dominate the fluid dynamics and heat
transfer problems. In particular, non-uniform transpiration is shown to significantly affect
the thermal and hydrodynamic responses of the system in the circumferential direction.
However, the permeability and porosity of the porous medium are found to have relatively
smaller influences.
impinging upon a flat porous insert to that on a circular cylinder inside a porous medium.
The surface of the cylinder is subject to constant temperature and can include uniform or
non-uniform transpiration. These cylindrical configurations are introduced in the analyses
of stagnation-point flows in porous media for the first time. The equations governing steady
transport ofmomentum and thermal energy in porous media are reduced to simpler nonlinear
differential equations and subsequently solved numerically. This reveals the dimensionless
velocity and temperature fields of the stagnation-point flow, as well as theNusselt number and
shear stress on the surface of the cylinder. The results showthat transpiration on the surface of
the cylinder and Reynolds number of the external flow dominate the fluid dynamics and heat
transfer problems. In particular, non-uniform transpiration is shown to significantly affect
the thermal and hydrodynamic responses of the system in the circumferential direction.
However, the permeability and porosity of the porous medium are found to have relatively
smaller influences.
کلیدواژه(گان): Stagnation-point flow · Porous media · Semi-similar solution
کالکشن
:
-
آمار بازدید
On the Hydrodynamics and Heat convection of an Impinging External Flow upon a cylinder with Transpiration and Embedded in a Porous Medium
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| contributor author | R. Alizadeh | en |
| contributor author | اصغر برادران رحیمی | en |
| contributor author | N. Karimi | en |
| contributor author | A. Alizadeh | en |
| contributor author | Asgar Bradaran Rahimi | fa |
| date accessioned | 2020-06-06T13:36:45Z | |
| date available | 2020-06-06T13:36:45Z | |
| date issued | 2017 | |
| identifier uri | http://libsearch.um.ac.ir:80/fum/handle/fum/3361961 | |
| description abstract | This paper extends the existing studies of heat convection by an external flow impinging upon a flat porous insert to that on a circular cylinder inside a porous medium. The surface of the cylinder is subject to constant temperature and can include uniform or non-uniform transpiration. These cylindrical configurations are introduced in the analyses of stagnation-point flows in porous media for the first time. The equations governing steady transport ofmomentum and thermal energy in porous media are reduced to simpler nonlinear differential equations and subsequently solved numerically. This reveals the dimensionless velocity and temperature fields of the stagnation-point flow, as well as theNusselt number and shear stress on the surface of the cylinder. The results showthat transpiration on the surface of the cylinder and Reynolds number of the external flow dominate the fluid dynamics and heat transfer problems. In particular, non-uniform transpiration is shown to significantly affect the thermal and hydrodynamic responses of the system in the circumferential direction. However, the permeability and porosity of the porous medium are found to have relatively smaller influences. | en |
| language | English | |
| title | On the Hydrodynamics and Heat convection of an Impinging External Flow upon a cylinder with Transpiration and Embedded in a Porous Medium | en |
| type | Journal Paper | |
| contenttype | External Fulltext | |
| subject keywords | Stagnation-point flow · Porous media · Semi-similar solution | en |
| journal title | Transport in Porous Media | fa |
| pages | 10-Jan | |
| journal volume | 1 | |
| journal issue | 1 | |
| identifier link | https://profdoc.um.ac.ir/paper-abstract-1064710.html | |
| identifier articleid | 1064710 |