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ERIC Number: EJ907130
Record Type: Journal
Publication Date: 2011-Jan
Pages: 11
Abstractor: As Provided
Reference Count: 6
ISSN: ISSN-0143-0807
Stokes Equation in a Toy CD Hovercraft
de Izarra, Charles; de Izarra, Gregoire
European Journal of Physics, v32 n1 p89-99 Jan 2011
This paper deals with the study of a toy CD hovercraft used in the fluid mechanics course for undergraduate students to illustrate the lubrication theory described by the Stokes equation. An experimental characterization of the toy hovercraft (measurements of the air flow value, of the pressure in the balloon and of the thickness of the air film under the hovercraft) allows us to evaluate a reduced Reynolds number R*. Since R* less than 1, it is possible to simplify the Navier-Stokes equation that is reduced to the Stokes equation, on the basis of the lubrication theory. The pressure gradient in the air flow is calculated, allowing us to establish the lifting force applied on the toy hovercraft. In addition, these results are applied to a larger scale hovercraft. (Contains 9 figures.)
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Publication Type: Journal Articles; Reports - Descriptive
Education Level: Higher Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A