Department of Energy Argonne National Laboratory Office of Science NEWTON's Homepage NEWTON's Homepage
NEWTON, Ask A Scientist!
NEWTON Home Page NEWTON Teachers Visit Our Archives Ask A Question How To Ask A Question Question of the Week Our Expert Scientists Volunteer at NEWTON! Frequently Asked Questions Referencing NEWTON About NEWTON About Ask A Scientist Education At Argonne Boundary layers and airplanes
Name: wildman jackson
Status: N/A
Age: N/A
Location: N/A
Country: N/A
Date: Around 1995


Question:
What exactly is a Boundary Layer, and what relationship does it have to planes?



Replies:
When a solid body moves through a fluid such as air, there is a thin layer next to the surface of the body where the fluid moves with the body. There is no slip of the fluid with respect to the body in this thin layer. At greater distances from the surface, there is some slip, and the fluid is dragged along at some speed between that of the body and the stationary mass of fluid. This layer, in which the fluid is being dragged by the body, is the boundary layer. The behavior of this boundary layer is very important in determining such things as the drag force on the body. At high speeds, such as with an airplane, the drag force can be very large. Understanding what the boundary layer is doing can help to reduce this force.

proach


Click here to return to the Engineering Archives

NEWTON is an electronic community for Science, Math, and Computer Science K-12 Educators, sponsored and operated by Argonne National Laboratory's Educational Programs, Andrew Skipor, Ph.D., Head of Educational Programs.

For assistance with NEWTON contact a System Operator (help@newton.dep.anl.gov), or at Argonne's Educational Programs

NEWTON AND ASK A SCIENTIST
Educational Programs
Building 360
9700 S. Cass Ave.
Argonne, Illinois
60439-4845, USA
Update: June 2012
Weclome To Newton

Argonne National Laboratory