Thermal boundary layer flow of a micropolar fluid past a wedge with constant wall temperature

1999 ◽  
Vol 138 (1-2) ◽  
pp. 113-121 ◽  
Author(s):  
Y. J. Kim
Keyword(s):  
Boundary Layer ◽  
Wall Temperature ◽  
Boundary Layer Flow ◽  
Micropolar Fluid ◽  
Thermal Boundary Layer ◽  
Constant Wall Temperature ◽  
Layer Flow

scholarly journals Unsteady boundary layer flow of a casson fluid past an oscillating vertical plate with constant wall temperature

2015 ◽  
Vol 11 (1) ◽  
Author(s):  
Asma Khalid ◽  
Ilyas Khan ◽  
Sharidan Shafie
Keyword(s):  
Boundary Layer ◽  
Newtonian Fluid ◽  
Wall Temperature ◽  
Boundary Layer Flow ◽  
Vertical Plate ◽  
Casson Fluid ◽  
Unsteady Boundary Layer ◽  
Constant Wall Temperature ◽  
Casson Fluid Model ◽  
Layer Flow

The unsteady boundary layer flow is presented for non-Newtonian fluid flow past an oscillating vertical plate with constant wall temperature. The Casson fluid model is used to distinguish the non-Newtonian fluid behavior. The governing partial differential equations corresponding to the momentum and energy equations are transformed into dimensionless forms, by using suitable transformations. Laplace transform method is used to find the exact solutions of these equations. The expressions for shear stress in terms of skin friction and the rate of heat transfer in terms of Nusselt number are also obtained. Numerical results of velocity and temperature profiles with various values of embedded flow parameters are shown graphically and their effects are discussed in detail. 

The Design and Validation of a Thermal Boundary Layer Wall Plate

2019 ◽  
Vol 141 (12) ◽  
Author(s):  
Drummond Biles ◽  
Alireza Ebadi ◽  
Michael P. Allard ◽  
Christopher M. White
Keyword(s):  
Boundary Layer ◽  
Wall Temperature ◽  
Thermal Transport ◽  
Boundary Layer Flow ◽  
Thermal Boundary Layer ◽  
Convective Heat Transfer Coefficient ◽  
Three Dimensional ◽  
Boundary Layer Flows ◽  
Layer Flow ◽  
Nonequilibrium Boundary Layer

A feedback controlled thermal wall plate designed to investigate thermal boundary layer flows is described and validated. The unique capabilities of the design are the ability to modify the thermal boundary conditions in a variety of ways or to hold the wall-temperature fixed even when the flow above the wall is unsteady and strongly three-dimensional. These capabilities allow for the generation and study of thermal transport in nonequilibrium boundary layer flows driven by different perturbations and of varying complexity. The thermal wall plate and the experimental facility in which the thermal wall plate is installed are first described. The wall-plate is then validated in a zero-pressure-gradient (ZPG) boundary layer flow for conditions of a uniform wall temperature and a temperature step. It is then shown that the wall temperature can be held constant even when a hemisphere body is placed on the wall that produces large localized variations in the convective heat transfer coefficient. Last, since the thermal wall plate is intended to support the study of thermal transport in a variety of nonequilibrium boundary layer flow, several possible experimental configurations are presented and described.

Laminar Heat Transfer for Gas-Liquid Segmented Flows in Circular and Non-Circular Ducts With Constant Wall Temperature

2014 ◽  
Author(s):  
Y. S. Muzychka
Keyword(s):  
Heat Transfer ◽  
Boundary Layer ◽  
Wall Temperature ◽  
Thermal Boundary Layer ◽  
Additional Parameter ◽  
Residence Times ◽  
Constant Wall Temperature ◽  
Fully Developed Flow ◽  
New Model ◽  
Layer Flow

A new model is developed for gas-liquid segmented flows in ducts and channels. This model is an improvement of an earlier analysis presented and published by the author. In the present work, it is shown that for constant wall temperature, the dimensionless mean wall flux has two characteristic behaviours: thermal boundary layer flow and fully developed flow. These can also be viewed as short and long residence times as the plug train moves through the tube or channel. The boundary layer limit is dominant for short residence times while fully developed flow occurs for longer residence times. An additional parameter, the plug length to duct length ratio, (Ls/L), is shown to have significant impact on the rate of heat transfer. This parameter has the limits 0 < Ls/L < 1. The new model is compared with data from several published studies in which the variables were well controlled. It is also shown that careful experiments must be undertaken to demonstrate the characteristics of this type of flow under constant wall temperature conditions.

Boundary Layer Flow Due to a Moving Flat Plate in Micropolar Fluid

2005 ◽  
Vol 43 (1) ◽  
Author(s):  
Mohd. Zuki Salleh ◽  
Azizah Mohd Rohni ◽  
Norsarahaida Amin
Keyword(s):  
Boundary Layer ◽  
Flat Plate ◽  
Boundary Layer Flow ◽  
Micropolar Fluid ◽  
Layer Flow
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