Friction Drag Reduction Using Superhydrophobic Surface in High Reynolds Number Turbulent Flow

Abstract

Bodies covered by SLIPS present a slip velocity at the surface. This significant modification to the no-slip boundary condition will affect the separation, transitional behavior, and the stability of the flow. Here, our studies included (1) large scale towing tank tests to assess the drag reducing performance and durability of SLIPS at high Reynolds number; (2) flow studies over streamlined and bluff bodies where pressure gradients are important and separation can occur, in order to understand the mechanisms by which SLIPS can influence separation; and (3) investigations of the influence of SLIPS on the stability thresholds that govern the transition to turbulence in laminar boundary layers, and the stability of wakes.

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Document Details

Document Type
Technical Report
Publication Date
Dec 25, 2017
Accession Number
AD1041577

Entities

People

  • Alexander Smits

Organizations

  • Princeton University

Tags

DTIC Thesaurus Topics

  • Abstracts
  • Boundaries
  • Boundary Layer
  • Contracts
  • Drag
  • Drag Reduction
  • Engineering
  • Fabrication
  • Flow
  • Fluid Dynamics
  • Fluid Mechanics
  • Instructions
  • Laminar Boundary Layer
  • Pressure Gradients
  • Reynolds Number
  • Students
  • Turbulent Flow

Readers

  • Fluid Mechanics and Fluid Dynamics.
  • Materials Science (Mechanical Engineering).