Control of fluid flow and heat transfer around a square cylinder by uniform suction and blowing at low Reynolds numbers

2015 ◽  
Vol 109 ◽  
pp. 155-167 ◽  
Author(s):  
A. Sohankar ◽  
M. Khodadadi ◽  
E. Rangraz
Keyword(s):  
Heat Transfer ◽  
Fluid Flow ◽  
Reynolds Numbers ◽  
Square Cylinder ◽  
Low Reynolds Numbers ◽  
Uniform Suction ◽  
Flow And Heat Transfer ◽  
Low Reynolds ◽  
Suction And Blowing

Simultaneous Prediction of Solid Stress, Heat Transfer and Fluid Flow by a Single Algorithm

2002 ◽  
Author(s):  
D. B. Spalding
Keyword(s):  
Heat Transfer ◽  
Fluid Flow ◽  
Thermal Stresses ◽  
Turbine Blades ◽  
Reynolds Numbers ◽  
Low Reynolds Numbers ◽  
Gas Turbine Blades ◽  
Flow And Heat Transfer ◽  
Solid Stress ◽  
Simultaneous Prediction

It is frequently required to simulate fluid-flow and heat-transfer processes in and around solids which are, partly as a consequence of the flow, subject to thermal and mechanical stresses. Often, indeed, it is the stresses which are of major concern, while the fluid and heat flows are of only secondary interest. Engineering examples of fluid/heat/stress interactions include: • Gas-turbine blades under transient conditions; • “Residual stresses” resulting from casting or welding; • Thermal stresses in nuclear reactors during emergency shut-down; • Manufacture of bricks and ceramics; • Stresses in the cylinder blocks of diesel engines; • The failure of steel-frame buildings during fires. It has been customary for two computer codes to be used for the solution of such problems, one for the fluid flow and the other for the stresses. Iterative interaction between the two codes is then employed, often with considerable inconvenience. It is often believed that FLUID-FLOW and SOLID-STRESS problems must be solved by different methods and different computer programs. This is not true, if the solid-stress problems are formulated in terms of DISPLACEMENTS. The lecture exemplifies and explains how both DISPLACEMENTS and VELOCITIES can be calculated at the same time. Also described, incidentally, are economical methods of simulating: thermal RADIATION between solids immersed in fluids; and TURBULENT CONVECTION at low Reynolds numbers in the same situation.

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