Flat_plate_turbulent_BL

Flat_plate_turbulent_BL - The Turbulent Flat Plate Boundary...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: The Turbulent Flat Plate Boundary Layer (Section 10-6, engel and Cimbala) The turbulent flat plate boundary layer velocity profile : The time-averaged turbulent flat plate (zero pressure gradient) boundary layer velocity profile is much fuller than the laminar flat plate boundary layer profile, and therefore has a larger slope u / y at the wall, leading to greater skin friction drag along the wall. Re x , cr = 5 10 5 Note: The vertical scale is exaggerated for clarity. We define the engineering critical Reynolds number: Re x < Re x , cr BL most likely laminar Re x > Re x , cr BL most likely turbulent w = u / y at y = 0 There are three common empirical relationships for the turbulent flat plate boundary layer velocity profile: The one-seventh-power law : The log law : Spaldings law of the wall : Quantities of interest for the turbulent flat plate boundary layer : Just as we did for the laminar (Blasius) flat plate boundary layer, we can use these expressions...
View Full Document

Page1 / 3

Flat_plate_turbulent_BL - The Turbulent Flat Plate Boundary...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online