Jon Gretarsson

Personal Profile

Jón Tómas Grétarsson

Title:

Graduate Student

Department(s):

Institute of Computational and Mathematical Engineering

Location:

Gates 204, Durand 028H

Mail Code:

Phone:

(774) 262-4752

Fax:

E-mail:

jontg

@stanford.edu

URL:

http://www.stanford.edu/~jontg/

Research Statement:

I am interested in examining the many varied aspects of computational simulation, from video games and movie special effects to the design of mechanical systems and study of fluid flow phenomena. I have worked on developing a two-way coupled framework that permits the simulation of fluid-structure interactions between incompressible flows and arbitrary constituitively modeled volumetric and thin-shell solid models. I have also been involved in reformulating the Euler equations into a semi-implicit integration scheme, permitting the fast simulation of low Mach number flows -- in the zero Mach limit, our scheme can robustly take time steps at a CFL number over 300, far outstriping previous work. I am currently extending this semi-implicit reformulation to conservatively capture Fluid-Structure interactions in a stable, accurate manner (for high mass ratios). I am also involved with a project sponsored by the Office of Naval Research to design and implement a numerical methodology to capture the stiff, nonlinear effects of shock waves on the hull of underwater craft (such as submarines).

Additional Information

Education:

M.S./Ph.D. Candidate in the Institute of Computational and Mathematical Engineering. Stanford University, CA, USA
B.S. in Computer Science with a minor in Mathematics. Worcester Polytechnic Institute, 2006, MA, USA

Publications (Selected):

N. Kwatra, J. Su, J. Grétarsson, R. Fedkiw. A Method for Avoiding the Acoustic Time-Step Restriction in Compressible Flow, Journal of Computational Physics 228, 4146-4161, 2009. http://physbam.stanford.edu/~fedkiw/papers/stanford2008-04.pdf

A. Robinson-Mosher, T. Shinar, J. Grétarsson, J. Su, R. Fedkiw. Two-way Coupling of Fluids to Rigid and Deformable Solids and Shells. SIGGRAPH 2008, ACM TOG 27, 46.1-46.9, 2008. http://physbam.stanford.edu/~fedkiw/papers/stanford2008-01.pdf

J. Grétarsson, F. Li, M. Li, A. Samant, H. Wu, M. Claypool and R. Kinicki. Performance Analysis of the Intertwined Effects Between Network Layers for 802.11g Transmissions. WMuNeP: Proceedings of the 1st ACM Workshop on Wireless Multimedia Networking and Performance Modelling, pg. 123-130; October 2005.http://web.cs.wpi.edu/~claypool/papers/co-ap/paper.pdf