Current Research, Publications (and Cycling)

Statistical mechanical modeling of vibration-driven granular flow

Statistical mechanical modeling of vibration-driven grain piles reveals that these systems share most of the essential dynamical properties of conventional flowing liquids.  This project is developing experimental and theoretical tools for studying and modeling these systems.  Collaborators: Professors Peter Tkacik and Brid Mullany.

Overview

vibration overview1vibration flow2

 


Weathering and subcritical cracking of surface rock

Surface rock deteriorates under the combined action of solar heating, chemical and biological erosion,  and, e.g., freezing. This project combines theoretical modeling of near-surface, environmentally-driven, subcritical cracking of rock with a variety of field observations, including acoustic emission measurements from instrumented rocks, to expose the physical processes that cause weathering. Collaborator: Professor Missy Eppes.

Overview: experiments and modeling (AGU-2016)

AGU2015FINALEPoster

 

Research Overview – 2015 American Geophysical Union


Shock-boundary layer interactions within rocket nozzles

This project combines physical and analytical modeling and high-speed schlieren imaging to better understand  shock-boundary layer interactions in supersonic rocket nozzle flows.   Collaborators:  Professors Peter Tkacik and Karen Thorsett-Hill.

High speed color schlieren video of rocket nozzle blow down

Shock-train structure

 


Stochastic ascent dynamics of sounding rockets

Here, we’re developing high-level numerical, physical, and mathematical models which capture the effects of random nozzle side loads, random winds, random thrust variations, and deterministic aerodynamic loads on rocket ascent dynamics. Collaborators: Professor Peter Tkacik and Dr. Nilabh Srivastava.

sideloadvers6

 


Green’s function-stochastic process approaches for linear and nonlinear evolution problems

Useful connections between Green’s functions and stochastic processes are being developed and exploited.


Blast-structure interactions – ISERRT

ISERRT web site

In collaboration with Professor David Weggel (Civil Engineering, UNC Charlotte)


 USA Cycling Racing Page 

https://www.usacycling.org/results/?compid=354814

 CMS Time Trial Series Page 

http://transambikerace.com/

 ResearchGate

https://www.researchgate.net/profile/Russell_Keanini


 Google Citations

Google citations