In fluid mechanics, internal flow is a flow for which the fluid is confined by a surface. Hence the boundary layer is unable to develop without eventually being constrained. The internal flow configuration represents a convenient geometry for heating and cooling fluids used in chemical processing, environmental control, and energy conversion technologies.
An example includes flow in a pipe.
- E. M. Greitzer; C. S. Tan; M. B. Graf (26 February 2007). Internal Flow: Concepts and Applications. Cambridge University Press. ISBN 978-1-139-45111-6.
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