Graduate School Dean?

Use of the UK Supercomputer by my CFD group will be mainly directed toward development of an incompressible large-eddy simulation (LES) code employing near, advanced synthetic-velocity subgrid-scale (SGS) models.

Project 1. "Analysis of filters for explicitly-filtered large-eddy simulation."

This project is a fundamental study of filtering techniques employed in large-eddy simulation (LES). In recent years it has been recognized that "explicit" filtering (filter solution components, rather than equations of motion is preferred) something we had always known and used here at UK; but this requires specifying and using specific filters and their associated parameters. It turns out that these parameters can act as bifurcation parameters much as does the Reynolds number in the Navier--Stokes equations, themselves; in turn, this mean that a wrong choice of filter parameter(s) can lead to completely non-physical solutions. This project is investigating the details of this for two widely-used filters: the Shuman filter and the Pade filter. The LES code that my group has been developing is used for all calculations.

Project 1 - Involves turbulent simulation in, and around buildings in a urban setting using the LES code, and it will ultimately involve transport of pollutants and possibly biohazards.

Project 2. "Near real-time simulation of forest fire spread."

This project is aimed at improving accuracy of forest fire spread rate predictions by using high resolution SGS models in LES. The goal is to ultimately be able to make detailed predictions faster than real time. This requires several main innovations with respect to the existing LES code: 1) implementation of a porous-medium mode of able to approximate arbitrary forests; 2) use of real-time measured heat transfer from burning regions to avoid having to simulate combustion chemistry; and 3) parallelization. Items and 3) are already in progress. The code is an extension of that being used in Project 1.

Project 2 - Focuses on implementation of "immersed-boundary" techniques in LES code and using this to simulate flight of flapping-wing objects---insects and MAVs.

Project 3."Efficient, accurate subgrid-scale models for finite-rate combustion chemistry in large-eddy simulation."

This project is in its very early stages. The goal is to add finite-rate reaction chemistry capability to the LES code. The student is currently working on high-fidelity, but low-dimensional, subgrid-scale (SGS) models associated with combustion chemistry. These SGS models represent extensions of the poor man's Navier--Stokes equations to the case of combustion chemistry.

Project 3 - Is a fundamental study of synthetic-velocity turbulence models for LES.

Project 4 - Is aimed at improving accuracy of forest fire spread rate predictions by using high resolution SGS models in LES. The goal is to ultimately be able to make detailed predictions faster that real time.

Project 5 - Is in it's very early stages but it will ultimately allow simulation of turbulent flows containing particular matter.

Project 6 - Also in very early stages, will add finite-rate reaction chemistry capability to the LES code.

Software:

FieldView
gnuplot
Fortran
C++
ifort
gfortran
gcc
emacs
nedit
vi

Research Participants:

1. Keyu Chen
2. Zach Li
3. Weiyun Liu
4. Tingting Tang
5. Peiding Wang
6. Wenwei Zhen
7. Rick Fu (coadvised by Dr. Martin)
8. Martin Weng ' '
9. Paul Zhang ' '
10. Fernando Camacho
11. Dr. Bakhyt Alipova (Fulbright Scholar)
12. Isaiah J Adams

See input from Alexandre Martin.

Summer 2014 - Computational Fluid Dynamics Research project

Student

Chow, Christopher - Purdue University

EGR601-002 Introduction to Research in Engineering

253-FPAT: MWF, 9:00–9:50 a.m.
Fall Semester 2015

Coordinator

Name: Prof. Alexandre Martin Office: 261 RGAN
Email: alexandre.martin@uky.edu Phone: (859) 257-4462
Office hours: Monday to Friday, 9AM to 5PM

Instructors:

Name: Prof. Matthew Beck Office: 157 FPAT
Email: beck@engr.uky.edu Phone: (859) 257-0039

Name: Prof. Eric Grulke Office: 359 RGAN
Email: egrulke@engr.uky.edu Phone: (859) 257-60979

Name: Prof. James McDonough Office: 267 RGAN
Email: jmmcd@uky.edu Phone: (859) 218-0657

Name: Prof. John Balk Office: 177 FPAT
Email: balk@engr.uky.edu Phone: (859) 257-4582

Course ME699-002F14

Instructors:
Beck, Matthew J
Martin, Alexandre
McDonough, James
Grulke, Eric

Students 2014

Adams, Dean Holden
Henry, Michael Aaron
Li, Lifeng l
Liu, Zhanqiu
Mahmoudi, Siamak
Smith, David Leo
Zhang, Yumo
Zhang, Zheng
Zhou, Shanshan

Course ME699-002F13

Instructors:
McDonough, James
Martin, Alexandre
Beck, Matthew J
Grulke, Eric

Students 2013

Sabah F Alhamdi
Tyler L Vanover
Brandon M Witte
Ruimeng Wu
Ruiqian Zhan

All of these students have made at least one conference presentation reporting results obtained on the supercomputer; some have several such presentations as well as reviewed conference papers. A list of these follows.

Presentations:

1. Weiyun Liu and J. M. McDonough, Comparison under different Shuman filter values of 3-D lid-driven cavity problems, 37th Dayton-Cincinnati Aerospace Sciences Symposium, Mar. 6, 2012.
2. T. Tang and J. M. McDonough, The poor man's Navier-Stokes equation with Darcy and Forchheimer terms, 37th Dayton-Cincinnati Aerospace Sciences Symposium, Mar. 6, 2012.
3. Keyu Chen and J. M. McDonough, Computational fluid dynamics models of turbulence in urban settings, 38th Dayton-Cincinnati Aerospace Sciences Symposium, Mar. 6, 2013.
4. Rui Fu, Alexandre Martin and J. M. McDonough, Application of a 2-D poor man's Navier-Stokes equation in simulation of injection and combustion of scramjet engine, 38th Dayton-Cincinnati Aerospace Sciences Symposium, Mar. 6, 2013.
5. Zhiyong Li and J. M. McDonough, Numerical simulation of flapping wing
models and exploration of near wall effects, 38th Dayton-Cincinnati Aerospace Sciences Symposium, Mar. 6, 2013.
6. Weiyun Liu and J. M. McDonough, Comparison of filtering methods for large-eddy simulation, 38th Dayton-Cincinnati Aerospace Sciences Symposium, Mar. 6, 2013.
7. Tingting Tang and J. M. McDonough, Exploration of a general relationship between porosity and permeability, 38th Dayton-Cincinnati Aerospace Sciences Symposium, Mar. 6, 2013.
8. Peiding Wang and J. M. McDonough, Models of turbulence in sand-dust storms, 38th Dayton-Cincinnati Aerospace Sciences Symposium, Mar. 6, 2013.
9. Wenwei Zeng and J. M. McDonough, The poor man's Navier-Stokes equation with hydrogen-oxygen finite-rate chemistry, 38th Dayton-Cincinnati Aerospace Sciences Symposium, Mar. 6, 2013.
10. Huai-Bao Zhang, J. M. McDonough and Alexandre Martin, Implementation, verification and validation of chemical nonequilibrium in a hypersonic CFD code, 37th Dayton-Cincinnati Aerospace Sciences Symposium, Mar. 6, 2012.
11. Huai-Bao Zhang, Alexandre Martin and J. M. McDonough, Parallel efficiency of the FreeCFD code for hypersonic flows with chemistry, presented at 24th International Conference on Parallel Computational Fluid Dynamics, Atlanta, GA, may 22-25, 2012.
12. Tingting Tang, Weiyun Liu and J. M. McDonough, Parallelization of linear iterative methods for solving the 3-D pressure Poisson equation using various programming languages, to appear in Procedia Engineering.
13. Tingting Tang, Weiyun Liu and J. M. McDonough, Parallelization of linear iterative methods for solving the 3-D pressure Poisson equation using various programming languages, presented at 25th International Conference on Parallel Computational Fluid Dynamics, Changsha, P. R. China, May 20-24, 2013.
14. Weiyun Liu and J. M. McDonough, Effects of filtering parameter value on simulation results, to be presented at American Physical Society Division of Fluid Dynamics Meeting, Pittsburg, PA, Nov. 24-26, 2013.
15. Tingting Tang and J. M. McDonough, Exploration of a general permeability model, to be presented at American Physical Society Division of Fluid Dynamics Meeting, Pittsburg, PA, Nov. 24-26, 2013.
16. Wenwei Zeng and J. M. McDonough, Discrete dynamical system model for H2-air finite-rate chemistry, to be presented at American Physical Society Division of Fluid Dynamics Meeting, Pittsburg, PA, Nov. 24-26, 2013.

See Alexandre Martin's input for a few more publications.