Prediction of drag for rough wall boundary layer flows

Add to your list(s) Download to your calendar using vCal

• Karen Flack, US Naval Academy
• Friday 03 December 2021, 16:00-17:00
• Fluid Mechanics Webinar Series.

If you have a question about this talk, please contact Prof. Jerome Neufeld.

Significant progress has been made towards the understanding of rough-wall boundary layers and the subsequent drag penalty. Continued progress is promising since a larger range of parameter space can now be investigated experimentally and numerically. Recent advances in rapid prototyping techniques enables the generation of systematic variations of roughness scales and computationally efficient simulations with creative surface mapping techniques allows for experiments and computations to investigate similar complex roughness. While a universal drag prediction correlation is still elusive and may not be possible, predictive correlations for classes of surface roughness pertinent to engineering applications seem achievable. Three surface parameters based solely on surface statistics are showing promise in predictive correlations for a range of studies. These include a measure of surface elevation a slope parameter and the skewness of the surface elevation probability density function. Other candidate parameters that may be useful in a predictive correlation or a surface filter are the streamwise and spanwise correlation lengths. The challenges to represent this wide range of surface conditions and potential scales to characterize engineering roughness including biofouling in predictive correlations will be discussed.

webinar link: www.cambridge.org/core/journals/journal-of-fluid-mechanics/fluid-mechanics-webinar-series

This talk is part of the Fluid Mechanics (DAMTP) series.

This talk is included in these lists:

• All CMS events
• All Talks (aka the CURE list)
• CMS Events
• CamBridgeSens
• Cambridge talks
• Combined External Astrophysics Talks DAMTP
• Cosmology, Astrophysics and General Relativity
• DAMTP Fluids Talks
• DAMTP info aggregator
• Fluid Mechanics (DAMTP)
• Fluid Mechanics Webinar Series
• Interested Talks
• Life Science Interface Seminars
• SJC Regular Seminars
• School of Physical Sciences
• Talks related to atmosphere and ocean dynamics and climate science
• Trust & Technology Initiative - interesting events
• bld31

Note that ex-directory lists are not shown.