This Grant is a continuation of (N00014-12-1-0874) PASSIVE AND ACTIVE FRICTION DRAG REDUCTION OF TURBULENT FLOWS OVER SUPERHYDROPHOBIC
Abstract
Funds are provided to perform the following efforts: We will be able to bring together the results from each effort to develop an enhanced physical understanding of how SHS s can lead to friction reduction of turbulent boundary layers. Specifically, we will do the following: (a) We will systematically evaluate the best performing sprayable SHS for FDR using both the UM and JHU testing facilities. The surfaces properties and topology will be characterized, and its effect of the flow will be determined for a range of Reynolds numbers and static pressures of the flow. These will be "passive surfaces", in that there will be no active gas replenishment. (b) We will continue to examine porous SHS that will permit active gas replenishment, and compare their performance to the passive surfaces. (c) We will experimentally evaluate FDR on structured SHS s with geometries that match those being computed by U. Minnesota and Stanford groups. (d) We will combine our results from both experiments and computations to develop criteria for the breakdown of the Cassie-Baxter state of the SHS, with the goal of optimizing SHS robustness.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jun 03, 2016
- Source ID
- N000141612239
Entities
People
- Steven Ceccio
Organizations
- Board of Regents of the University of Michigan
- Office of Naval Research
- United States Navy