dich hộ cái. tks; INTRODUCTION It is well known in naval architecture that when a body moves through a fluid parallel to a wall , an interaction force and moment will act on the body because of the presence of the wall. Normally the force will be positive in the direction toward the wall, and this force will become more pronounced as the body is moved closer to the wall. the moment will generall increase also, under these circumstances, but its sign is not definite and will depend on the detailed shape of the body; for a body with fore-and-aft symmetry the moment will vanish, under the assumptions of ideal flow, because of the corresponding symmetry of the resulting flow. there are several instances in which this problem may be of practical interest, particularly for a ship moving in restricted water near a bank or wall of a canal(and where at low speeds the effects of the free surface are not important). Recent interest in oceanofraphic submarines has posed a similar problem for a vehicle moving in close proximity to the bottom.
Posted on: Sun, 16 Feb 2014 04:20:44 +0000
Trending Topics
Recently Viewed Topics
© 2015