Change of Variable for Limit Coating Hypothesis | Exam Study Help

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The discussion centers on the "limit coat" hypothesis in fluid dynamics, specifically regarding the negligible pressure gradients within this region. The user references equations 6.0 to 8.0 and Dirichlet boundary conditions, indicating a mathematical approach to understanding this phenomenon. The term "limit coat" is clarified as likely referring to the "boundary layer," a critical concept in fluid mechanics. Understanding these equations and their implications is essential for mastering the topic.

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I'm french and my englis is bad sorry but i need help !

My exam :

In this part of the study, we considered the hypothesis of limit coat and that the gradients of pressure are negligible in this limit coat. The previous system is :

http://nsm05.casimages.com/img/2011/01/20//110120113941704087499697.png

With limits condition of Dirichlet.

With a change of varaible, the eqaution 6.0 to 8.0 give :

http://nsm05.casimages.com/img/2011/01/20//110120113941704087499696.png


Can you help me ?
 
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"limit coat"? Could you mean "boundary layer"?
 

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