Web: http://www.ima.umn.edu | Email: ima-staff@ima.umn.edu | Telephone: (612) 624-6066 | Fax: (612) 626-7370
Additional newsletters available at http://www.ima.umn.edu/newsletters

IMA Newsletter #403

May 2010

2009-2010 Program

See http://www.ima.umn.edu/2009-2010/ for a full description of the 2009-2010 program on Complex Fluids and Complex Flows.

News and Notes

Schedule

Monday, May 3

10:45am-11:15amCoffee breakLind Hall 400

Tuesday, May 4

10:45am-11:15amCoffee breakLind Hall 400
11:15am-12:15pmThe role of maximum dissipation principle in numerical computations for complex fluidsYunkyong Hyon (University of Minnesota)Lind Hall 305 PS

Wednesday, May 5

1:00pm-3:00pmIMA Spring Picnic Lind Hall 400

Thursday, May 6

10:45am-11:15amCoffee breakLind Hall 400

Friday, May 7

10:45am-11:15amCoffee breakLind Hall 400
1:25pm-2:25pmIdentifying and quantifying uncertainty in computational modelsGenetha Anne Gray (Sandia National Laboratories)Vincent Hall 570 IPS

Monday, May 10

10:45am-11:15amCoffee breakLind Hall 400

Tuesday, May 11

10:45am-11:15amCoffee breakLind Hall 400
11:15am-12:15pmClosed - form solutions of PDEs through functional frameworkSamuel Segun Okoya (Obafemi Awolowo University)Lind Hall 305 PS

Wednesday, May 12

10:45am-11:15amCoffee breakLind Hall 400

Thursday, May 13

10:45am-11:15amCoffee breakLind Hall 400

Friday, May 14

10:45am-11:15amCoffee breakLind Hall 400

Monday, May 17

10:45am-11:15amCoffee breakLind Hall 400

Tuesday, May 18

10:45am-11:15amCoffee breakLind Hall 400
11:15am-12:15pmKinetic-fluid boundary layers and ppplications to hydrodynamic limits of Boltzmann equationNing Jiang (Courant Institute of Mathematical Sciences)Lind Hall 305 PS

Wednesday, May 19

10:45am-11:15amCoffee breakLind Hall 400

Thursday, May 20

10:45am-11:15amCoffee breakLind Hall 400

Friday, May 21

10:45am-11:15amCoffee breakLind Hall 400
11:15am-12:15pmOn the soliton dynamics under a slowly varying medium for generalized KdV equations [Note change of date]Claudio Muñoz (Université Versailles/Saint Quentin-en-Yvelines)Lind Hall 305 PS

Monday, May 24

10:45am-11:15amCoffee breakLind Hall 400

Tuesday, May 25

10:45am-11:15amCoffee breakLind Hall 400

Wednesday, May 26

10:45am-11:15amCoffee breakLind Hall 400

Thursday, May 27

10:45am-11:15amCoffee breakLind Hall 400

Friday, May 28

10:45am-11:15amCoffee breakLind Hall 400

Monday, May 31

All DayMemorial Day. The IMA is closed

Event Legend:

IPSIndustrial Problems Seminar
PSIMA Postdoc Seminar
Abstracts
Genetha Anne Gray (Sandia National Laboratories) Identifying and quantifying uncertainty in computational models
Abstract: Despite their obvious advantages, computer simulations also introduce many challenges. Uncertainties must be identified and quantified in order to guarantee some level of predictive of a computational model. Calibration techniques can be applied to both improve the model and to curtail the loss of information caused by using simulations in place of the actual system. Evaluating and calibrating a computer model is dependent on three main components: experimental data, model parameters, and algorithmic techniques. Data is critical as it defines reality, and inadequate data can render model evaluation procedures useless. Model parameters should be studied to determine which affect the predictive capabilities of model and which do not. Those that do are subject to calibration. Techniques for model evaluation and calibration should both sufficiently sample the design space and limit the computational burden. In this talk, we will discuss the problems inherent in model calibration and validation processes in terms of data, parameters and algorithms. In particular, we will focus on suitable techniques of optimization and statistics for some specific numerical models from the areas of electrical engineering, medicine, and groundwater control. We will demonstrate some successful and some not so successful approaches.
Yunkyong Hyon (University of Minnesota) The role of maximum dissipation principle in numerical computations for complex fluids
Abstract: I will talk about the general energetic variational approaches for hydrodynamic systems of complex fluids. In these energetic variational approaches, the least action principle (LAP) with action functional gives the Hamiltonian parts (conservative force) of the hydrodynamic systems, and the maximum/minimum dissipation principle (MDP), i.e., Onsager's principle, gives the dissipative parts (dissipative force) of the systems. When we combine the two systems derived from the two different principles through the force balance law, we obtain a whole coupled nonlinear system of equations satisfying the dissipative energy laws. Also, I will discuss the important roles of MDP in designing numerical method for computations of hydrodynamic system in complex fluids. The MDP is employed in the reformulated dissipation to obtain the dissipative force for the hydrodynamic system. The systems are consistent with the Hamiltonian parts which are derived from LAP. This procedure allows the usage of lower order element (a continuous $C^0$ finite element) in numerical method to solve the system rather than high order elements, and at the same time preserves the dissipative energy law. Finally, I will show some numerical results of the free interface motion in the mixture of two different fluids.
Ning Jiang (Courant Institute of Mathematical Sciences) Kinetic-fluid boundary layers and ppplications to hydrodynamic limits of Boltzmann equation
Abstract: In a bounded domain with smooth boundary (which can be considered as a smooth sub-manifold of R3), we consider the Boltzmann equation with general Maxwell boundary condition---linear combination of specular reflection and diffusive absorption. We analyze the kinetic (Knudsen layer) and fluid (viscous layer) coupled boundary layers in both acoustic and incompressible regimes, in which the boundary layers behave significantly different. The existence and damping properties of these kinetic-fluid layers depends on the relative size of accommodation number and Kundsen number, and the differential geometric property of the boundary (the second fundamental form.) As applications, first we justify the incompressible Navier-Stokes-Fourier limit of the Boltzmann equation with Dirichlet, Navier, and diffusive boundary conditions respectively, depending on the relative size of accommodation number and Kundsen number. Using the damping property of the boundary layer in acoustic regime, we proved the convergence is strong. The second application is that we derive and justified the higher order acoustic approximation of the Boltzmann equation. This is a joint work with Nader Masmoudi.
Claudio Muñoz (Université Versailles/Saint Quentin-en-Yvelines) On the soliton dynamics under a slowly varying medium for generalized KdV equations [Note change of date]
Abstract: We consider the problem of the soliton propagation, in a slowly varying medium, for a generalized Korteweg - de Vries equations (gKdV). We study the effects of inhomogeneities on the dynamics of a standard soliton. We prove that slowly varying media induce on the soliton solution large dispersive effects in large time. Moreover, unlike gKdV equations, we prove that there is no pure-soliton solution in this regime.
Samuel Segun Okoya (Obafemi Awolowo University) Closed - form solutions of PDEs through functional framework
Abstract: The functional framework approach to PDE was developed by Rubel to study some problems of Mathematical Physics. It identifies a separation of variables on a domain in the appropriate Euclidean space. I'll indicate progress on some related analytical solutions of some models which arises in real life. Theorems will be stated and proved. Some corresponding results of Rubel are deduced as the limiting cases when some emerging parameters are equal to zero.
Visitors in Residence
Dhanapati Adhikari Oklahoma State University 5/31/2010 - 6/6/2010
Alexander Alexeev Georgia Institute of Technology 5/31/2010 - 6/5/2010
Anders Peter Andersen Technical University of Denmark 5/31/2010 - 6/5/2010
Arezoo Ardekani Massachusetts Institute of Technology 5/31/2010 - 6/5/2010
Nusret Balci University of Minnesota 9/1/2009 - 8/31/2010
Tsevi Beatus Cornell University 5/31/2010 - 6/5/2010
Jennifer Beichman University of Michigan 9/1/2009 - 5/31/2010
Gordon Joseph Berman Princeton University 5/31/2010 - 6/5/2010
Adam Boucher University of New Hampshire 5/31/2010 - 6/6/2010
Luca Brandt Royal Institute of Technology (KTH) 5/31/2010 - 6/7/2010
Kenny Breuer Brown University 5/31/2010 - 6/4/2010
Maria-Carme T. Calderer University of Minnesota 9/1/2009 - 6/30/2010
Chongsheng Cao Florida International University 5/15/2010 - 5/23/2010
Chi Hin Chan University of Minnesota 9/1/2009 - 8/31/2010
Xianjin Chen University of Minnesota 9/1/2008 - 8/31/2010
Stephen Childress New York University 5/10/2010 - 6/6/2010
Luis H. Cisneros University of Arizona 5/31/2010 - 6/5/2010
Fredric S Cohen Rush University Medical Center 5/31/2010 - 6/5/2010
Itai Cohen Cornell University 5/31/2010 - 6/6/2010
Aline Cotel University of Michigan 5/31/2010 - 6/5/2010
Darren G. Crowdy Imperial College London 5/31/2010 - 6/3/2010
Zhenlu Cui Fayetteville State University 5/31/2010 - 6/5/2010
Domenico D'Alessandro Iowa State University 4/15/2010 - 6/30/2010
Mark Denny Stanford University 5/31/2010 - 6/4/2010
Antonio DeSimone International School for Advanced Studies (SISSA/ISAS) 5/31/2010 - 6/5/2010
Charles R. Doering University of Michigan 8/15/2009 - 6/10/2010
Deborah Edmund University of Michigan 5/31/2010 - 6/4/2010
Robert S. Eisenberg Rush University Medical Center 5/31/2010 - 6/5/2010
Jeff D. Eldredge University of California, Los Angeles 5/31/2010 - 6/5/2010
Acmae El Yacoubi Cornell University 5/30/2010 - 6/4/2010
Randy H. Ewoldt University of Minnesota 9/1/2009 - 8/31/2010
Aseel Farhat University of California, Irvine 5/15/2010 - 5/23/2010
Lisa Fauci Tulane University 5/31/2010 - 6/6/2010
Frank E. Fish West Chester University 5/31/2010 - 6/5/2010
Hermes Gadêlha University of Oxford 5/30/2010 - 6/6/2010
Eamonn Andrew Gaffney University of Oxford 5/31/2010 - 6/6/2010
Ramiro Godoy-Diana Centre National de la Recherche Scientifique (CNRS) 5/31/2010 - 6/5/2010
Daniel Ivan Goldman Georgia Institute of Technology 5/31/2010 - 6/5/2010
Michael D. Graham University of Wisconsin 5/31/2010 - 6/5/2010
Genetha Anne Gray Sandia National Laboratories 5/6/2010 - 5/8/2010
Andong He Pennsylvania State University 5/30/2010 - 6/5/2010
Anette Peko Hosoi Massachusetts Institute of Technology 5/31/2010 - 6/5/2010
David Hu Georgia Institute of Technology 5/31/2010 - 6/5/2010
Xianpeng Hu University of Pittsburgh 5/31/2010 - 6/5/2010
Vera Mikyoung Hur University of Illinois at Urbana-Champaign 2/18/2010 - 5/28/2010
Yunkyong Hyon University of Minnesota 9/1/2008 - 8/31/2010
Mark Iwen University of Minnesota 9/1/2008 - 8/31/2010
Pieter Jan Antoon Janssen University of Wisconsin 5/31/2010 - 6/5/2010
Srividhya Jeyaraman University of Minnesota 9/1/2008 - 8/31/2010
Lijian Jiang University of Minnesota 9/10/2008 - 8/31/2010
Ning Jiang Courant Institute of Mathematical Sciences 5/18/2010 - 5/19/2010
Michael S. Jolly Indiana University 5/15/2010 - 5/18/2010
Mihailo Jovanovic University of Minnesota 9/11/2009 - 6/10/2010
Ning Ju Oklahoma State University 1/4/2010 - 6/30/2010
Sunghwan (Sunny) Jung Virginia Polytechnic Institute and State University 5/31/2010 - 6/3/2010
Eva Kanso University of Southern California 5/31/2010 - 6/5/2010
Anthony José Kearsley National Institute of Standards and Technology 4/29/2010 - 5/1/2010
Markus Keel University of Minnesota 7/21/2008 - 6/30/2010
Scott David Kelly University of North Carolina - Charlotte 5/31/2010 - 6/5/2010
Kimberly D. Kendricks Central State University 5/10/2010 - 7/19/2010
Hyejin Kim University of Minnesota 9/1/2009 - 8/31/2010
Pawel Konieczny University of Minnesota 9/1/2009 - 8/31/2010
Amy Lang University of Alabama 5/31/2010 - 6/5/2010
Adam Larios University of California, Irvine 5/20/2010 - 5/29/2010
Ronald G. Larson University of Michigan 5/31/2010 - 6/5/2010
Eric Lauga University of California, San Diego 5/31/2010 - 6/4/2010
Anita Layton Duke University 5/31/2010 - 6/5/2010
Chiun-Chang Lee National Taiwan University 10/22/2009 - 6/30/2010
Sanghyuk Lee Seoul National University 5/2/2010 - 5/8/2010
David Lentink Wageningen University and Research Center 5/31/2010 - 6/5/2010
Rachel Levy Harvey Mudd College 5/31/2010 - 6/5/2010
Marta Lewicka University of Minnesota 9/1/2009 - 6/30/2010
Congming Li University of Colorado 1/11/2010 - 6/15/2010
Yongfeng Li University of Minnesota 9/1/2008 - 8/31/2010
Zhi (George) Lin University of Minnesota 9/1/2009 - 8/31/2010
Bin Liu New York University 5/31/2010 - 6/5/2010
Chun Liu University of Minnesota 9/1/2008 - 8/31/2010
Jerome Loheac Université de Nancy I (Henri Poincaré) 5/31/2010 - 6/6/2010
Ellen K. Longmire University of Minnesota 9/1/2009 - 6/30/2010
Evelyn Manalo Lunasin University of Arizona 5/25/2010 - 6/12/2010
Enkeleida Lushi New York University 5/31/2010 - 6/5/2010
Krishnan Mahesh University of Minnesota 9/1/2009 - 6/30/2010
Kara Lee Maki University of Minnesota 9/1/2009 - 8/31/2010
Vasileios Maroulas University of Minnesota 9/1/2008 - 7/31/2010
Hassan Masoud Georgia Institute of Technology 5/31/2010 - 6/5/2010
Anna L. Mazzucato Pennsylvania State University 1/12/2010 - 6/11/2010
Gareth Huw Mckinley Massachusetts Institute of Technology 5/31/2010 - 6/4/2010
Laura Ann Miller University of North Carolina 5/31/2010 - 6/5/2010
Irina Mitrea Worcester Polytechnic Institute 5/2/2010 - 5/6/2010
Michal Mlejnek Corning Incorporated 5/31/2010 - 6/5/2010
Kamran Mohseni University of Colorado 5/31/2010 - 6/5/2010
Yoichiro Mori University of Minnesota 9/1/2009 - 6/30/2010
Claudio Muñoz Université Versailles/Saint Quentin-en-Yvelines 5/19/2010 - 5/24/2010
Hoa Nguyen Tulane University 5/31/2010 - 6/6/2010
Monika Nitsche Ohio State University 5/31/2010 - 6/5/2010
Dongjuan Niu Capital Normal University 4/1/2010 - 6/15/2010
Clara O'Farrell California Institute of Technology 5/30/2010 - 6/5/2010
Samuel Segun Okoya Obafemi Awolowo University 2/15/2010 - 5/15/2010
Sarah Olson Tulane University 5/31/2010 - 6/5/2010
Yizhar Or Technion-Israel Institute of Technology 5/31/2010 - 6/6/2010
Cecilia Ortiz-Duenas University of Minnesota 9/1/2009 - 8/31/2010
Hans G. Othmer University of Minnesota 9/1/2009 - 6/30/2010
Jifeng Peng University of Alaska 5/31/2010 - 6/5/2010
Manu Prakash Harvard University 5/31/2010 - 6/5/2010
Juan Mario Restrepo University of Arizona 8/11/2009 - 6/15/2010
Leif Gibbens Ristroph Cornell University 5/31/2010 - 6/5/2010
Rolf Ryham Rice University 5/13/2010 - 6/15/2010
David Saintillan University of Illinois at Urbana-Champaign 5/31/2010 - 6/5/2010
Fadil Santosa University of Minnesota 7/1/2008 - 6/30/2011
Arnd Scheel University of Minnesota 9/1/2009 - 6/30/2010
William W. Schultz University of Michigan 5/28/2010 - 6/5/2010
George R Sell University of Minnesota 9/1/2009 - 6/30/2010
Tsvetanka Sendova University of Minnesota 9/1/2008 - 8/31/2010
Shuanglin Shao University of Minnesota 9/1/2009 - 8/31/2010
Michael J. Shelley New York University 5/31/2010 - 6/5/2010
Henry Shum University of Oxford 5/31/2010 - 6/5/2010
Jake Socha Virginia Polytechnic Institute and State University 5/31/2010 - 6/3/2010
Saverio Eric Spagnolie University of California, San Diego 5/31/2010 - 6/6/2010
Daniel Spirn University of Minnesota 9/8/2009 - 6/1/2010
Panagiotis Stinis University of Minnesota 9/1/2009 - 6/30/2010
Wanda Strychalski University of California, Davis 5/31/2010 - 6/5/2010
Susan S. Suarez Cornell University 5/31/2010 - 6/5/2010
Vladimir Sverak University of Minnesota 9/1/2009 - 6/30/2010
Daniel See-Wai Tam Massachusetts Institute of Technology 5/31/2010 - 6/5/2010
Russ Tedrake Massachusetts Institute of Technology 5/31/2010 - 6/5/2010
Jean-Luc Thiffeault University of Wisconsin 9/1/2009 - 6/30/2010
Benjamin Thiria École Supérieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI) 5/30/2010 - 6/6/2010
Becca Thomases University of California, Davis 2/9/2010 - 6/12/2010
Giordano Tierra Chica University of Sevilla 4/6/2010 - 6/15/2010
Edriss Saleh Titi University of California 3/28/2010 - 6/18/2010
Chad Michael Topaz Macalester College 9/1/2009 - 6/29/2010
Marius Tucsnak Université de Nancy I (Henri Poincaré) 5/30/2010 - 6/6/2010
Patrick Theodore Underhill Rensselaer Polytechnic Institute 5/31/2010 - 6/5/2010
Steven Vogel Duke University 5/31/2010 - 6/5/2010
Shawn W. Walker New York University 5/30/2010 - 6/5/2010
Changyou Wang University of Kentucky 9/1/2009 - 6/15/2010
Jane Wang Cornell University 5/31/2010 - 6/5/2010
Xiaoming Wang Florida State University 1/5/2010 - 5/14/2010
Paul Webb University of Michigan 5/31/2010 - 6/5/2010
Nathaniel Whitaker University of Massachusetts 5/31/2010 - 6/5/2010
Sijue Wu University of Michigan 9/1/2009 - 6/5/2010
Wei Xiong University of Minnesota 9/1/2008 - 8/31/2010
Jin Xu Shanghai University of Traditional Chinese Medicine 12/9/2009 - 6/9/2010
Sheng Xu Southern Methodist University 5/31/2010 - 6/5/2010
Xiang Xu Pennsylvania State University 1/13/2010 - 6/13/2010
Jeannette Yen Georgia Institute of Technology 5/31/2010 - 6/5/2010
Tsuyoshi Yoneda University of Minnesota 9/4/2009 - 8/31/2010
Jun Zhang New York University 5/31/2010 - 6/6/2010
Zhifei Zhang Beijing (Peking) University 2/15/2010 - 5/14/2010
Weigang Zhong University of Minnesota 9/8/2008 - 9/30/2010
Qiang Zhu University of California, San Diego 5/31/2010 - 6/5/2010
Legend: Postdoc or Industrial Postdoc Long-term Visitor

IMA Affiliates:
Arizona State University, Boeing, Corning Incorporated, ExxonMobil, Ford, General Motors, Georgia Institute of Technology, Honeywell, IBM, Indiana University, Iowa State University, Kent State University, Korea Advanced Institute of Science and Technology (KAIST), Lawrence Livermore National Laboratory, Lockheed Martin, Los Alamos National Laboratory, Medtronic, Michigan State University, Michigan Technological University, Microsoft Research, Mississippi State University, Motorola, Northern Illinois University, Ohio State University, Pennsylvania State University, Portland State University, Purdue University, Rice University, Rutgers University, Sandia National Laboratories, Schlumberger Cambridge Research, Schlumberger-Doll, Seoul National University, Siemens, Telcordia, Texas A & M University, University of Central Florida, University of Chicago, University of Delaware, University of Houston, University of Illinois at Urbana-Champaign, University of Iowa, University of Kentucky, University of Maryland, University of Michigan, University of Minnesota, University of Notre Dame, University of Pennsylvania, University of Pittsburgh, University of Tennessee, University of Wisconsin, University of Wyoming, US Air Force Research Laboratory, Wayne State University, Worcester Polytechnic Institute