Global Announcements

Spotlight

Bhagirath Addepalli

Bhagirath Addepalli

Hometown: Hyderabad, India

Program: PhD (Graduated May 2012)

Current Position: Microsoft Program Manager

Research Interests: Fundamental and applied research in fluid dynamics, inverse and optimization techniques, and statistical modeling and analysis of data. Specifically, interests include: laboratory experiments, computational fluid dynamics, Lagrangian random-walk modeling, development of novel case-specific objective functionals (metrics) for inverse problems, development of efficient and robust optimization and inversion techniques spanning deterministic, stochastic (frequentist), and Bayesian methods, multiple criteria decision making (MCDM - Pareto optimality), linear and nonlinear regression techniques for stochastic modeling, statistical modeling of time series data, model selection in inverse problems.

Publications:
A) Journal Publications / Pre-prints:
a) Addepalli, B., K. Sikorski, E.R. Pardyjak and M.S. Zhdanov. Source characterization of atmospheric releases using stochastic search and regularized gradient optimization. Inverse Problems in Science and Engineering, 2011. 19(8): p. 1097-1124.
b) Addepalli, B. and E.R. Pardyjak. A pseudo-metric to handle zero measurements and predictions in atmospheric inverse-source problems. Under review. Submitted to Inverse Problems in Science and Engineering.
c) Addepalli, B. and E.R. Pardyjak. Investigation of flow structure in step-up street canyons. Ready to be submitted to Boundary Layer Meteorology. Pre-print available upon request.
d) Addepalli, B. and E.R. Pardyjak. Study of flow fields in asymmetric step-down street canyons. Ready to be submitted to Boundary Layer Meteorology. Pre-print available upon request.
e) Addepalli, B., E.R. Pardyjak, P. Willemsen and D.E. Johnson. Urban form optimization for air quality applications using simulated annealing and genetic algorithms. Ready to be submitted to Atmospheric Environment. Pre-print available upon request.
f) Addepalli, B. Markov Chain Monte Carlo annealing for atmospheric inverse-source problems. To be submitted to Inverse Problems in Science and Engineering. Pre-print available upon request.

B) Peer-reviewed Conference Publications:
a) Addepalli, B., K. Sikorski, E.R. Pardyjak and M.S. Zhdanov. Quasi-Monte Carlo, Monte Carlo, and regularized gradient optimization methods for source characterization of atmospheric releases. in Dagstuhl Seminar Proceedings 09391, Algorithms and Complexity for Continuous Problems. 2009. Dagstuhl, Germany: Schloss Dagstuhl - Leibniz-Zentrum fuer Informatik, Germany.
b) Addepalli, B. and E.R. Pardyjak. Study of flow fields in asymmetric step-down street canyons. in The International Workshop on Physical Modelling of Flow and Dispersion Phenomena (PHYSMOD). 2007. University of Orleans, France.

C) Conference Publications:
a) Pardyjak, E.R., Addepalli, B., et al., Impact of green infrastructure on urban microclimate and air quality, in the 8th International Conference on Urban Climate - ICUC 8. 2012: Dublin, Ireland.
b) Addepalli, B. and C. Sikorski, A note on objective functions for atmospheric inverse-source problems, in second National Conference in Advancing Tools and Solutions for Nuclear Material Detection. 2011: Salt Lake City, UT.
c) Addepalli, B. and C. Sikorski, Efficient adaption of simulated annealing and genetic algorithms to atmospheric inverse-source problems, in AIChE Annual Meeting. 2010: Salt Lake City, UT.
d) Addepalli, B. and C. Sikorski, Tools to characterize the source of hazardous releases, in 1st National Conference on Advancing Tools and Solutions for Nuclear Material Detection. 2010: Salt Lake City, UT.
e) Addepalli, B., M.J. Brown, E.R. Pardyjak and I. Senocak. Evaluation of the QUIC-URB wind model using wind-tunnel data for step-up street canyons, in Seventh Symposium on the Urban Environment. 2007: San Diego, CA.
f) Addepalli, B. and E.R. Pardyjak. 2D PIV Measurements of street canyon flow for buildings with varying angles and separation distances. in American Meteorological Society Sixth Symposium on the Urban Environment. 2006: Atlanta, GA.

D) Conference Presentations:
a) Addepalli, B., E.R. Pardyjak, P. Willemsen and D.E. Johnson. GPU-MCDM: A new module of the Quick Urban and Industrial Complex (QUIC) dispersion modeling system for urban form optimization. in the 8th International Conference on Urban Climate - ICUC 8. 2012: Dublin, Ireland.
b) Addepalli, B., E.R. Pardyjak, P. Willemsen and D.E. Johnson. Development of a multiple criteria decision making (MCDM) tool for urban form optimization. in 92nd AMS Annual Meeting. 2012: New Orleans, LA.
c) Addepalli, B., E.R. Pardyjak, P. Willemsen and D.E. Johnson. Urban form optimization for air quality applications using simulated annealing and genetic algorithms. in Ninth Symposium on the Urban Environment. 2010: Keystone, CO.
d) Addepalli, B., M.J. Brown, E.R. Pardyjak and I. Senocak. Investigation of the flow structure around step-up, step-down, deep canyon, and isolated tall building configurations using wind-tunnel PIV measurements, in Seventh Symposium on the Urban Environment. 2007: San Diego, CA.
e) Addepalli, B., E.R. Pardyjak and M.J. Brown. The effect of geometry on the wake structure of a surface mounted obstacle. in 60th Annual Meeting of the APS Divison of Fluid Dynamics. 2007: Salt Lake City, UT.
f) Addepalli, B. and E.R. Pardyjak. Experimental investigation of the effect of Reynolds number and HΔ value on flow fields in street canyons with cubical Buildings. in American Physical Society, 59th Annual Meeting of the APS Division of Fluid Dynamics. 2006: Tampa Bay, FL.
g) Addepalli, B. and E.R. Pardyjak. 2D PIV measurements of flow between a pair of model buildings with varying geometries. in American Physical Society, 58th Annual Meeting of the Division of Fluid Dynamics. 2005: Chicago, IL.

E) Technical Reports:
a) Addepalli, B., C. Sikorski and E.R. Pardyjak. Source Characterization of atmospheric releases using quasi-random sampling and gradient optimization. Report submitted to the School of Computing, University of Utah. Report number: UUCS 09-001.
b) Nelson, M., B. Addepalli, D. Boswell and M.J. Brown. QUIC Start Guide (v 4.5). Los Alamos National Labratory. LA-UR-07-2799.

Contact: addbugs@gmail.com

ME 2450 - Numerical Methods

Spring 2006

Class Information

Instructor: Eric Pardyjak
Lecture Time/Location: M,W 2:00 pm-2:50 pm EMCB 101
Office hours: 3pm - 4pm M W
Office: Room 160 KEN
Phone: 585-6414
email:pardyjak@eng.utah.edu
Text: Numerical Methods for Engineers by S.C. Chapra and R.P. Canale, Fifth Edition, McGraw Hill 2006.

Class Syllabus

Announcements:

April 11, 2006: We will have QUIZ #4 on WebCT this coming Weds and Thursday (April 19 and 20) from noon on Weds to midnight on Thursday.

April 2, 2006: We will have a quiz on WebCT this Thursday and Friday on iterative solvers and curve fitting methods.

April 2, 2006: The due date for homework 7 has been delayed to April 3.

Feb 27, 2006: I've added my Muller's method code in the handout sections below for those who had difficulty programming it up.

Feb 15, 2006: Quiz number 2 will run from Tuesday 2/21 at noon through Thursday 2/23 at noon on WebCT. It will be a 15 minute quiz covering Roots of Equations.

Feb 8, 2006: Homework 4's due date has been changed to Feb 13. Also, the first quiz has been scheduled for Thursday and Friday Feb 9 and 10. You can take the quiz on webCT anytime between 10am Thursday and 5pm Friday.

Jan 29, 2006: I will be out of town this week. Dr. James Guilkey will be lecturing. He will be able to answer any questions you may have on this weeks homework. I will NOT have a quiz this week. We will discuss the first quiz when I return.

Jan 23, 2006: I will hold additinal Office Hours on Tuesday from 3-4pm

Assignments:

Homework #1 (Due 1/18/2006): 1.12, 1.13

Homework #2 (Due 1/25/2006): 3.2, 3.7, 3.9, 3.10 (code should be written for 3.2 & 3.9)

Homework #3 (Due 2/1/2006): 4.5, 4.6, 4.15 (no code is required for this week's homework)

Homework #4 (Due 2/13/2006): 5.2, 5.7 5.15 (code should be written to solve all three problems. This will essentially require you too write a bisection method solver and a false position method solver. Please hand in the following: your code and the solutions. If the question asks for you to graphically determine a root, be sure to include a plot)

Homework #5 (Due 2/22/2006): 6.3,7.4,7.17 (You will need to write a Newton Raphson solver code for 6.3 and a Mueller's method code for 7.4. No code is required for 7.17 although you may use the code you wrote from 7.4)

Homework #6 (Due 3/1/2006): 9.4, 9.8, 9.10 (please write code for problems 9.8 and 9.10)

Homework #7 (Due 4/3/2006): 10.2, 10.3, 11.7 (please write code for all three problems)

Homework #8 (Due 4/12/2006): 17.7, 17.12, 17.28 (please write codes for all problems)

Homework #9 (Due 4/19/2006): 21.6, 21.11, 22.4, 23.4 (No need to write code for these problems if you choose not to.)

Homework #10 (Due 4/26/2006): 25.18, 27.2, 27.3 (write code for all three please, use the Euler's method to solve 27.2, for problem 25.18 solve the ODE from problem 25.1 not 25.7, NOTE: 5 points of extra credit will be given if you do solve 25.7. If you are solving problem 25.1 please use a step size h=0.5. Also, for 27.2 if you use Runge-Kutta I will give you 5 extra credit points.)

Solutions:

Handouts:

Chapter 1-4 - Introductory Material

Chapter 5-8 - Roots of Equations

Chapter 9-12 - Linear Algebraic Equations

Chapter 17 - Curve Fitting

Chapter 21-23 - Numerical Integration and Differentiation

Chapter 25 and 27 - Ordinary differential Equations

  • Lecture 15: Introduction to ODEs and Runge-Kutta methods - Euler's method
  • Lecture 16: Introduction to Boundary Value Problems, the Shooting method, Finite Differences and PDEs

Miscellaneous Material that will help for the final exam

Grader Information

Prathap Ramamurthy
email: rprathap@gmail.com
Bharat Thakkari
email: thakkar_bs@yahoo.co.in