scholarly journals Discussion: “An Investigation of the Forces on Three Dimensional Bluff Bodies in Rough Wall Turbulent Boundary Layers” (Lee, B. E., and Soliman, B. F., 1977, ASME J. Fluids Eng., 99, pp. 503–509)

1977 ◽  
Vol 99 (3) ◽  
pp. 510-510
Author(s):  
I. S. Gartshore
Keyword(s):  
Boundary Layers ◽  
Three Dimensional ◽  
Turbulent Boundary Layers ◽  
Rough Wall ◽  
Bluff Bodies

The Form Drag of Three-Dimensional Bluff Bodies Immersed in Turbulent Boundary Layers

1982 ◽  
Vol 104 (3) ◽  
pp. 326-333 ◽  
Author(s):  
H. Sakamoto ◽  
M. Moriya ◽  
S. Taniguchi ◽  
M. Arie
Keyword(s):  
Boundary Layer ◽  
Circular Cylinder ◽  
Boundary Layers ◽  
Bluff Body ◽  
Three Dimensional ◽  
Turbulent Boundary Layers ◽  
Bluff Bodies ◽  
Smooth Wall ◽  
Form Drag ◽  
Pressure Distributions

Measurements of the pressure distributions on the three-dimensional bluff bodies are correlated with the characteristics of the smooth-wall turbulent boundary layers in which the bodies are immersed. The bluff bodies selected for measurement were a cube and a vertical circular cylinder which can be considered as typical examples of three-dimensional bluff bodies. Experimental data were collected to investigate the effects of (1) the variation of the height of bluff bodies h, (2) the characteristics of the smooth-wall boundary layers in which they are immersed, on the form drag acting on the three-dimensional bluff bodies. For flow with zero-pressure gradient, the form drag coefficients of the cube and the vertical circular cylinder defined by CDτ=D/(1/2ρuτ2h2) are found to be expressed as a power-law function of huτ/ν in the range of h/δ less than about 1.0, where D is the form drag, uτ the shear velocity, ν the kinematic viscosity and δ the thickness of the undisturbed boundary layer at the location of the bluff bodies. For h/δ>1.0, the drag coefficients are independent of the parameter uτ/U0, being uniquely related to h/δ. Further, the pressure distributions along the front centerline of each bluff body can be expressed by a single curve irrespective of both the height of the bluff body and the boundary layer characteristics and show a good agreement with the dynamic pressure in an undisturbed boundary layer at the location of the bluff bodies in the range of about 0.2<y/h<0.7, where y is the distance from the wall.

Effects of Three-Dimensional Pressure Gradients on High-Speed Turbulent Boundary Layers

2021 ◽  
Author(s):  
Scott J. Peltier ◽  
Brian E. Rice ◽  
Ethan Johnson ◽  
Venkateswaran Narayanaswamy ◽  
Marvin E. Sellers
Keyword(s):  
Boundary Layers ◽  
High Speed ◽  
Three Dimensional ◽  
Turbulent Boundary Layers ◽  
Pressure Gradients

Simple eddy viscosity relations for three-dimensional turbulent boundary layers

AIAA Journal ◽  
1977 ◽  
Vol 15 (6) ◽  
pp. 886-887 ◽  
Author(s):  
George L. Mellor ◽  
H. James Herring
Keyword(s):  
Boundary Layers ◽  
Eddy Viscosity ◽  
Three Dimensional ◽  
Turbulent Boundary Layers
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