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 Tim March 2, 2001 04:54

modeling of small size cylinder

Hi I am thinking of the flow patten around a cylinder with diameter of 0.1-0.2 mm in air. What will you expect about such flow field? Is there any differences from normal size cylinder. Thanks.

 John C. Chien March 2, 2001 15:00

Re: modeling of small size cylinder

(1). Flow over a cylinder means: velocity of the flow, property of the fluid, and the size of the cylinder must be given to define the problem. (2). In your case, only one parameter is given. (3). What are the missing parameters? (4). From there, you can at least define the Reynolds number, Re=Rho*U*L/mu. (5). The flow pattern will be a function of the Reynold number.

 Tim March 2, 2001 21:48

Re: modeling of small size cylinder

Thanks for replying. Let me specify my question: Say when Reynolds Number is is larger than 1 or 30, there will be wake region. But when the size is so small, can we still imagine there will be wake as those in normal size cylinder?

 John C. Chien March 3, 2001 03:12

Re: modeling of small size cylinder

(1). It is a function of the Reynolds number of your problem, it is not a function of the diameter of the cylinder.

 muthu narayanan March 10, 2001 09:26

fluid analysis inside a two stroke petrol engine

i'm doing my project on flow inside a 2-stroke petrol engine.i would like anyone to help me in developing a moving grid(piston).is there any online articles available for the same.

 Dean March 10, 2001 14:28

Re: fluid analysis inside a two stroke petrol engi

Check out www.erc.wisc.edu/index.html.

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