Drag coefficient circular cylinder

For flow past a circular cylinder with L/d > normal to the cylinder axis, the flow is similar to over for a sphere. An equation that adequately represents the cylinder drag coefficient over the entire range of NRc (up to... 

Figure 5.1 Schematic showing the time history of lift and drags coefficients for flow past a circular cylinder at Re = 100.

Average drag coefficient for cross-flow over a smooth circular cylinder and a smooth sphere. From //. ScMichtift. Boyndary Layer Theory 7c. Copyright Q i979 The McGrow-Hill Companies. 

C Consider laminar flow of air across a hot circular cylinder. At what point on the cylinder will the heat liansfer be highest What would your answer be if the flow were turbulent 7-38C In flow over cylinders, why does ihe drag cocfTicient suddenly drop when the flow becomes turbulent Isn t turbulence supposed to increase the drag coefficient instead of decreasing it ... 

Sufficient information about the drag coefficient of the circular cylinder in a wide range of the Reynolds numbers can be found in Section 2.7. 

Nonseparating flow past a cylinder at moderate Reynolds numbers. According to experimental data [486], a nonseparating flow past a circular cylinder is realized at Re < 2.5. At such Reynolds numbers, one can use the following approximate formula for calculating the drag coefficient [94] ... 

In the book [117], some data are given on the hydrodynamic characteristics of bodies of various shapes these data mainly pertain to the region of precrisis self-similarity. The influence of roughness of the cylinder surface and the turbulence level of the incoming flow on the drag coefficient is discussed in [522]. In [211], the relationship between hydrodynamic flow characteristics in turbulent boundary layers and the longitudinal pressure gradient is studied. Analysis of the transition to turbulence in the wake of circular cylinders is presented in [333]. 

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