US 12,459,603 B2
Fluid entrapment via perforated surfaces for drag reduction
Paul S. Krueger, Plano, TX (US); David A. Willis, Dallas, TX (US); Haosen Tan, Dallas, TX (US); and Denise Cox, Dallas, TX (US)
Assigned to Southern Methodist University, Dallas, TX (US)
Filed by Southern Methodist University, Dallas, TX (US)
Filed on Oct. 27, 2022, as Appl. No. 17/975,441.
Claims priority of provisional application 63/272,579, filed on Oct. 27, 2021.
Prior Publication US 2023/0131080 A1, Apr. 27, 2023
Int. Cl. B63B 1/38 (2006.01); B60V 3/06 (2006.01); B63B 1/34 (2006.01); F15D 1/00 (2006.01); F15D 1/12 (2006.01)
CPC B63B 1/38 (2013.01) [B60V 3/06 (2013.01); B60V 3/065 (2013.01); B63B 1/34 (2013.01); F15D 1/12 (2013.01); B63B 2001/387 (2013.01); F15D 1/008 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A reduced drag surface comprising:
a perforated or porous surface exposed to a flowing fluid; and
a slip interface disposed between the perforated or porous surface and the flowing fluid, wherein the slip interface is formed from an entrapped fluid trapped at the perforated surface or the porous surface, wherein the entrapped fluid remains within the perforations or pores of the surface and the entrapped fluid does not enter the flowing fluid.