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Kenneth Duru - Applied Search Candidate Colloquium

Event Type: 
Dr. Kenneth Duru
Event Date: 
Thursday, January 18, 2018 -
3:30pm to 4:45pm
SMLC 356
Applied Search Committee

Event Description: 

Speaker:  Dr. Kenneth Duru
Title:  High fidelity numerical methods and simulation tools for time-domain  wave propagation  problems
High order accurate and robust (provably stable) numerical methods for time–domain propagating 
waves are critical  for progress in many fields  of engineering and physical sciences. Although 
frequency-domain calculations still  dominate much of the applied work, time-domain simulations 
will  become increasingly important to study broadband problems and nonlinear scatterers and 
sources. With the advent of exascale machines, the development of reliable high order accurate and 
energy aware (compute bound) numerical schemes becomes even more imperative, since it will enable 
optimal solutions for many wave propagation problems. Effective time-domain solvers must include 
domain truncation schemes which provide arbitrary accuracy at small cost and high order accurate 
and time stable volume discretizations applicable to het- erogeneous media with complex geometries. 
Furthermore, propagating waves are described by hyperbolic partial differential equations (PDEs), 
and because of the complexities of real geometries, internal interfaces, nonlinear 
boundary/interface conditions and the presence of disparate spatial and temporal scales in real 
media and sources, discontinuities and sharp wave fronts become fundamental features of the  
solutions. These introduce several theoretical and numerical challenges since we must resolve sharp 
wave fronts and accurately simulate discontinuous solutions.
In this presentation, I will talk about
1. New theories and practical aspects of perfectly matched layers to efficiently truncate large 
computational domains.
2. A systematic way to derive  high resolution  and strictly  stable finite difference and 
discontin- uous Galerkin approximations for systems of hyperbolic PDEs on conforming and 
non-comforming curvilinear meshes.
3. Numerical simulations of seismic waves and dynamic earthquake ruptures on nonplanar faults 
embedded in geometrically complex 3D earth models.

Event Contact

Contact Name: Deborah Sulsky

Contact Phone: 505-277-4613

Contact Email: