NUMERICAL STUDY OF DARCY FORCHHEIMER UNSTEADY MIXED CONVECTION FLOW OF NANOFLUID WITH AN EXPONENTIALLY DECREASING FREE-STREAM VELOCITY DISTRIBUTION

2020 ◽  
Vol 12 (4) ◽  
pp. 289-303
Author(s):  
G. Revathi ◽  
Ponnaiah Saikrishnan ◽  
M. Revathy ◽  
S. Jayanthi
Keyword(s):  
Mixed Convection ◽  
Velocity Distribution ◽  
Free Stream ◽  
Numerical Study ◽  
Free Stream Velocity ◽  
Convection Flow ◽  
Stream Velocity ◽  
Mixed Convection Flow ◽  
Unsteady Mixed Convection

Measurements of Turbulent Mixed Convection Flow Over a Vertical Forward-Facing Step

2003 ◽  
Author(s):  
H. I. Abu-Mulaweh ◽  
B. F. Armaly ◽  
T. S. Chen
Keyword(s):  
Mixed Convection ◽  
Free Stream ◽  
Free Stream Velocity ◽  
Heated Wall ◽  
Laser Doppler Velocimeter ◽  
Convection Flow ◽  
Stream Velocity ◽  
Convection Boundary Layer ◽  
Turbulent Natural Convection ◽  
Forward Facing Step

Measurements of turbulent mixed convection boundary-layer air flow over a two-dimensional, vertical forward-facing step are presented. The upstream and downstream walls and the step itself were heated to a uniform and constant temperature. Air velocity and temperature distributions and their turbulent fluctuations are measured simultaneously by using a two-component laser-Doppler velocimeter (LDV) and a cold wire anemometer were used, respectively. The present study treats buoyancy-dominated mixed convection over a vertical forward-facing step and examines the effect of a small free stream velocity on turbulent natural convection. It was found that the reattachment length increases while the heat transfer rate from the downstream heated wall decreases as the small free stream velocity increases.

Numerical Investigation of Unsteady Mixed Convection Flow

2007 ◽  
Author(s):  
Param Jeet Singh ◽  
S. Roy
Keyword(s):  
Mixed Convection ◽  
Nonlinear Partial Differential Equations ◽  
Skin Friction Coefficient ◽  
Convection Flow ◽  
Stream Velocity ◽  
Mixed Convection Flow ◽  
Boundary Layer Equations ◽  
Unsteady Mixed Convection ◽  
Implicit Finite Difference Scheme ◽  
Effect Of Surface

Unsteady mixed convection flow over a vertical slender cylinder under the combined effects of buoyancy force and thermal diffusion with injection/suction has been studied where the slender cylinder is inline with the flow. The unsteadiness is introduced by time dependent free stream velocity of the fluid. The effect of surface curvature is also taken into account, especially for the applications such as wire and fiber drawing, where accurate predictions are desired. The governing boundary layer equations along with the boundary conditions are first converted into dimensionless form by a non similar transformation, and then resulting system of coupled nonlinear partial differential equations is solved by an implicit finite difference scheme in combination with the quasilinearization technique. The effects of various parameters on velocity, temperature profiles, on skin friction coefficient and heat transfer rate at the wall are reported in the present study.

Sign in / Sign up

Export Citation Format

Share Document