Hello, I have a problem I am trying to model analytically (please note: I am NOT a fluid mechanics expert -- I come from a chemistry background): A semi-infinite plate is oriented axially in the direction of flow. Please refer to the following page for an illustration of my problem: http://www.ecourses.ou.edu/cgi-bin/eBook.cgi?doc=&topic=fl&chap_sec=09.3&page=theory The third picture is the Blasius solution, which does not apply at small Reynolds numbers. I am looking for an expression to tell me the thickness of the shaded viscous region from the top two pictures (i.e. - for small Reynolds numbers!) as function of position from the leading edge. Any references would be appreciated. Thanks!!