# modeling of small size cylinder

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 March 2, 2001, 04:54 modeling of small size cylinder #1 Tim Guest   Posts: n/a 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.

 March 2, 2001, 15:00 Re: modeling of small size cylinder #2 John C. Chien Guest   Posts: n/a (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.

 March 2, 2001, 21:48 Re: modeling of small size cylinder #3 Tim Guest   Posts: n/a 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?

 March 3, 2001, 03:12 Re: modeling of small size cylinder #4 John C. Chien Guest   Posts: n/a (1). It is a function of the Reynolds number of your problem, it is not a function of the diameter of the cylinder.

 March 10, 2001, 09:26 fluid analysis inside a two stroke petrol engine #5 muthu narayanan Guest   Posts: n/a 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.

 March 10, 2001, 14:28 Re: fluid analysis inside a two stroke petrol engi #6 Dean Guest   Posts: n/a Check out www.erc.wisc.edu/index.html.

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