BEGIN:VCALENDAR
PRODID:-//PSU Mathematics Department//Seminar iCalendar Generator//EN
VERSION:2.0
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-WR-CALNAME:CCMA PDEs and Numerical Methods Seminar Series
X-WR-TIMEZONE:America/New_York
BEGIN:VTIMEZONE
TZID:America/New_York
X-LIC-LOCATION:America/New_York
BEGIN:DAYLIGHT
TZOFFSETFROM:-0500
TZOFFSETTO:-0400
TZNAME:EDT
DTSTART:19700308T020000
RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=2SU
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:-0400
TZOFFSETTO:-0500
TZNAME:EST
DTSTART:19701101T020000
RRULE:FREQ=YEARLY;BYMONTH=11;BYDAY=1SU
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140103T120000
DTEND;TZID=America/New_York:20140103T170000
LOCATION:MB315
URL:http://www.math.psu.edu/seminars/meeting.php?id=19912
SUMMARY:CCMA PDEs and Numerical Methods Seminar Series - TBA
DESCRIPTION:Seminar: CCMA PDEs and Numerical Methods Seminar Series\nTitle:
TBA\nAbstract Link: http://
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140110T120000
DTEND;TZID=America/New_York:20140110T170000
LOCATION:MB315
URL:http://www.math.psu.edu/seminars/meeting.php?id=19996
SUMMARY:CCMA PDEs and Numerical Methods Seminar Series - TBA
DESCRIPTION:Seminar: CCMA PDEs and Numerical Methods Seminar Series\nTitle:
TBA\nAbstract Link: http://
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140114T131500
DTEND;TZID=America/New_York:20140114T141500
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=21467
SUMMARY:CCMA PDEs and Numerical Methods Seminar Series - The Entropy-Viscos
ity Technique and Splitting Methods for Turbulent Flows
DESCRIPTION:Seminar: CCMA PDEs and Numerical Methods Seminar Series\nTitle:
The Entropy-Viscosity Technique and Splitting Methods for Turbulent Flows
\nSpeaker: Adam Larios\, Texas A&M University\nAbstract: Two techniques ha
ve recently been developed to handle large-scale simulations of turbulent
flows. The first is a nonlinear\, LES-type viscosity\, which is based on
the numerical violation of the local energy balance of the Navier-Stokes e
quations. This technique enjoys a numerical dissipation which remains van
ishingly small in regions where the solution is smooth\, only damping the
flow in regions of numerical shock\, allowing for increased accuracy at re
duced computational cost. The second is a direction-splitting technique f
or projection methods\, which unlocks new parallelism previously unexploit
ed in fluid flows\, and enables very fast\, large-scale turbulence simulat
ions.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140117T153000
DTEND;TZID=America/New_York:20140117T170000
LOCATION:MB315
URL:http://www.math.psu.edu/seminars/meeting.php?id=19997
SUMMARY:CCMA PDEs and Numerical Methods Seminar Series - Method of Characte
ristics for Multiscale Modeling and Simulation (3:30PM-4:30PM)
DESCRIPTION:Seminar: CCMA PDEs and Numerical Methods Seminar Series\nTitle:
Method of Characteristics for Multiscale Modeling and Simulation (3:30PM-
4:30PM)\nSpeaker: Scott Miller\, Penn State Univeristy\nAbstract: The meth
od of characteristics is a technique for solving hyperbolic partial differ
ential equations. By transforming the original equations into characterist
ic variables\, the PDEs are transformed into ODEs which can be integrated
along the characteristic directions. Knowledge about the orientation of th
e characteristic hypersurfaces can be used to construct piecewise solution
s by utilizing the range of influence and domain of dependence. The result
ing solution process is extremely local in nature and is â€˜embarrassingly
parallelâ€™. In this talk\, we will review the method of characteristics
and introduce a special mesh generation procedure that creates causality-o
beying spacetime meshes. The spacetime discontinuous Galerkin (SDG) method
is used for the field solution on each patch of elements\, whereby small
patches of elements are solved independently from the rest of the global d
omain. The SDG method on causal space-time meshes results in a solution pr
ocedure with linear computational complexity. The direct discretization of
spacetime removes the need for separate temporal integration schemes\; ra
ther\, the entire spacetime domain solution is represented by finite eleme
nt basis functions defined on broken Sobolev spaces. SDG methods possess s
everal attractive features\, including: high order convergence rates\, fix
ed compact stencil for arbitrary interpolation order\, support for fully u
nstructured and non-conforming meshes\, and excellent stability and elemen
t-wise conservation properties. SDG methods are a natural choice for trans
ient simulations of dynamic\, non-smooth\, and complex physics. In this wo
rk\, we apply the SDG method to several different physical systems: linear
elastodynamics\, dynamic fracture mechanics\, inviscid gas dynamics\, and
hyperbolic heat conduction. These examples will demonstrate the robustnes
s of SDG for multi-scale and multi-physics applications\, including fully
nonlinear models and sharp interfaces.\n\nTalk will be 3:30 PM - 4:30 PM
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140124T153000
DTEND;TZID=America/New_York:20140124T170000
LOCATION:MB315
URL:http://www.math.psu.edu/seminars/meeting.php?id=19998
SUMMARY:CCMA PDEs and Numerical Methods Seminar Series - Verification and V
alidation of an Overset Fluid-Structure Interaction Solver (3:30PM-4:30PM)
DESCRIPTION:Seminar: CCMA PDEs and Numerical Methods Seminar Series\nTitle:
Verification and Validation of an Overset Fluid-Structure Interaction Sol
ver (3:30PM-4:30PM)\nSpeaker: Cooper Elsworth\, Penn State Univeristy\nAbs
tract: Existing overset mesh technology has been incorporated into an ALE
based Fluid-Structure Interaction (FSI) code\, producing a novel approach
for investigating fully-coupled FSI phenomena. In particular\, the Suggar+
+/DiRTlib overset mesh technology has been implemented into a partitioned
FSI solver based on OpenFOAM and in-house structural codes. The impetus of
this solver has been to address some of the problems that occur in comple
x FSI simulations\, most notably concerns with the mesh motion experienced
in large deformation cases. The solver intends to simplify mesh generatio
n\, maintain mesh quality throughout the simulation\, and provide similar
performance to current approaches through the implementation of overset me
thods. This talk presents the effects of overset methods on FSI simulation
s\, as well as provides validation for the overset FSI solver. Use of the
Turek and Hron benchmark case has allowed for the use of a consistent case
in the comparison of the proposed solver to current FSI method results an
d performance. Simulation data will be presented\, while investigations in
to the benefits of overset methods for FSI simulations will be discussed.
In addition\, the relative performance of the solver has been presented\,
in order to address the viability of the proposed solver's application.\n
\nThe talk is 3:30PM-4:30PM
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140131T153000
DTEND;TZID=America/New_York:20140131T170000
LOCATION:MB315
URL:http://www.math.psu.edu/seminars/meeting.php?id=19999
SUMMARY:CCMA PDEs and Numerical Methods Seminar Series - TBA
DESCRIPTION:Seminar: CCMA PDEs and Numerical Methods Seminar Series\nTitle:
TBA
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140207T153000
DTEND;TZID=America/New_York:20140207T170000
LOCATION:MB315
URL:http://www.math.psu.edu/seminars/meeting.php?id=20000
SUMMARY:CCMA PDEs and Numerical Methods Seminar Series - TBA
DESCRIPTION:Seminar: CCMA PDEs and Numerical Methods Seminar Series\nTitle:
TBA
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140214T153000
DTEND;TZID=America/New_York:20140214T170000
LOCATION:MB315
URL:http://www.math.psu.edu/seminars/meeting.php?id=20001
SUMMARY:CCMA PDEs and Numerical Methods Seminar Series - Phase Field Modeli
ng of Electrodeposition in Electrochemical systems and its application Li
Dendrite Formation in Li-ion Batteries
DESCRIPTION:Seminar: CCMA PDEs and Numerical Methods Seminar Series\nTitle:
Phase Field Modeling of Electrodeposition in Electrochemical systems and
its application Li Dendrite Formation in Li-ion Batteries\nSpeaker: Lei Ch
en\, Department of Materials Science and Engineering\, PSU\nAbstract: We h
ave developed a nonlinear phase-field model of electrodepostion in electro
chemical systems. The main thermodynamic driving forces for the electrode-
electrolyte interface evolution are limited to local variations of overpot
ential and chemical potential. Its application to the half-cell of lithium
ion batteries explicitly describes ions diffusion in the electrolyte\, ca
tions deposition on the electrode surface and an electrochemical reaction
at the electrode-electrolyte interface during charging operations. The lit
hium electrodeposition rate exactly follows the classical Butler-Volmer ki
netic with exponentially and linearly depending on local variations of ove
rpotential and cation concentration at the electrode surface\, respectivel
y. Simulation results show that the growth of dendritic deposit in electro
chemical systems is well captured by the proposed diffuse-interface model.
The longer and thicker deposits are observed both for larger charged curr
ent densities and reaction rate constants where the surface reaction rate
is high.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140221T153000
DTEND;TZID=America/New_York:20140221T170000
LOCATION:MB315
URL:http://www.math.psu.edu/seminars/meeting.php?id=20002
SUMMARY:CCMA PDEs and Numerical Methods Seminar Series - W-cycle algorithms
for hp-Discontinuous Galerkin discretizations
DESCRIPTION:Seminar: CCMA PDEs and Numerical Methods Seminar Series\nTitle:
W-cycle algorithms for hp-Discontinuous Galerkin discretizations\nSpeaker
: Marco Sarti\, Politecnico di Milano\nAbstract: In this talk I will discu
ss the main issues regarding the application of multigrid algorithms to hi
gh order Discontinuous Galerkin discretizations. I will first briefly intr
oduce several Discontinuous Galerkin schemes for the Poisson equation\, re
calling some standard results regarding the well posedness of the problem
and the error estimates. Then I will analyze the multilevel framework and
underline the main differences with the conforming case. I will show that
\, employing standard smoothing schemes\, we can recover the well known un
iformity of the rate of convergence with respect to the mesh size and the
number of levels\, but the dependence on the polyonomial order employed ca
nnot be eliminated. The theoretical estimates are then supported by severa
l numerical tests on two and three dimensional model problems.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140228T153000
DTEND;TZID=America/New_York:20140228T170000
LOCATION:MB315
URL:http://www.math.psu.edu/seminars/meeting.php?id=20003
SUMMARY:CCMA PDEs and Numerical Methods Seminar Series - TBA
DESCRIPTION:Seminar: CCMA PDEs and Numerical Methods Seminar Series\nTitle:
TBA
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140307T153000
DTEND;TZID=America/New_York:20140307T170000
LOCATION:MB315
URL:http://www.math.psu.edu/seminars/meeting.php?id=20004
SUMMARY:CCMA PDEs and Numerical Methods Seminar Series - TBA
DESCRIPTION:Seminar: CCMA PDEs and Numerical Methods Seminar Series\nTitle:
TBA
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140314T153000
DTEND;TZID=America/New_York:20140314T170000
LOCATION:MB315
URL:http://www.math.psu.edu/seminars/meeting.php?id=20005
SUMMARY:CCMA PDEs and Numerical Methods Seminar Series - Spring Break
DESCRIPTION:Seminar: CCMA PDEs and Numerical Methods Seminar Series\nTitle:
Spring Break\nSpeaker: Spring Break
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140321T153000
DTEND;TZID=America/New_York:20140321T170000
LOCATION:MB315
URL:http://www.math.psu.edu/seminars/meeting.php?id=20006
SUMMARY:CCMA PDEs and Numerical Methods Seminar Series - A neuronal network
model to study the context effects on pitch height comparison
DESCRIPTION:Seminar: CCMA PDEs and Numerical Methods Seminar Series\nTitle:
A neuronal network model to study the context effects on pitch height com
parison\nSpeaker: Chengcheng Huang\, Courant Institute of Mathematical Sci
ences\, New York University\nAbstract: Perception can be strongly influenc
ed by preceding context. Ambiguous stimuli are well suited to study the co
ntextual effect. A sequentially played pair of Shepard tones (comprised of
octave-spaced pure tones) can be ambiguously perceived as ascending or de
scending if they are separated by a half octave (tritone). However\, using
a preceding sequence of Shepard tones above/below the first tone and betw
een the tritone pair biases the shift perception toward ascending/descendi
ng. Paradoxically\, a pitch-based decoding algorithm of neurophysiological
recordings indicates a repulsive shift of the neural tone representations
\, raising questions about mechanisms for pitch height comparison. Our net
work model consists of 3 subpopulations (along tonotopy): two excitatory a
rrays (UP and DOWN) that drive a common inhibitory array that provides rec
urrent feedback but with oppositely directed asymmetric footprints. The UP
and DOWN units are direction selective and decisions are made by comparin
g their response levels. Comparisons of Shepard tone pairs using the model
\, with or without biasing\, agree with those in psychophysical studies. P
revious tones facilitate inhibitory synaptic strengths\, resulting in acti
vity reduction (adaptation) inside the biasing region and enlargement of t
he detection range for UP and DOWN units at the biasing region.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140328T153000
DTEND;TZID=America/New_York:20140328T170000
LOCATION:MB315
URL:http://www.math.psu.edu/seminars/meeting.php?id=20007
SUMMARY:CCMA PDEs and Numerical Methods Seminar Series - Multilevel precond
itioners for jump problems with mass term
DESCRIPTION:Seminar: CCMA PDEs and Numerical Methods Seminar Series\nTitle:
Multilevel preconditioners for jump problems with mass term\nSpeaker: Yun
rong Zhu\, Idaho State University\nAbstract: In this talk\, we analyze the
multilevel preconditioners for the finite element discretization of the s
econd order elliptic equation with mass/reaction term. We show that the di
scontinuities in the reaction term have only little impacts on the perform
ance of the preconditioners. Some numerical examples will be presented to
verify the results.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140401T011500
DTEND;TZID=America/New_York:20140401T021500
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=22660
SUMMARY:CCMA PDEs and Numerical Methods Seminar Series - TBA
DESCRIPTION:Seminar: CCMA PDEs and Numerical Methods Seminar Series\nTitle:
TBA\nSpeaker: Gung-Min gie\, Indiana University\nAbstract Link: http://
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140404T153000
DTEND;TZID=America/New_York:20140404T170000
LOCATION:MB315
URL:http://www.math.psu.edu/seminars/meeting.php?id=20008
SUMMARY:CCMA PDEs and Numerical Methods Seminar Series - TBA
DESCRIPTION:Seminar: CCMA PDEs and Numerical Methods Seminar Series\nTitle:
TBA
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140411T143000
DTEND;TZID=America/New_York:20140411T153000
LOCATION:MB106
URL:http://www.math.psu.edu/seminars/meeting.php?id=20009
SUMMARY:CCMA PDEs and Numerical Methods Seminar Series - Instability theory
of gaseous stars
DESCRIPTION:Seminar: CCMA PDEs and Numerical Methods Seminar Series\nTitle:
Instability theory of gaseous stars\nSpeaker: Ian Tice\, Carnegie Mellon
University\nAbstract Link: http://www.math.cmu.edu/math/faculty/Tice\nAbst
ract: A simple astrophysical model of stars considers them to be a\ncompac
t mass of self-gravitating compressible fluid. Such a fluid obeys\nthe co
mpressible Navier-Stokes-Poisson equations. In the case of\n"polytropic g
ases\," in which the pressure behaves like\n$P = K \\rho^\\gamma$ for $K>0
$ an entropy constant and $\\gamma >1$ an\nadiabatic constant\, one may co
nstruct compactly supported\, finite mass\,\nradially symmetric equilibriu
m solutions by reducing to the Lane-Emden\nODE (at least when $6/5 < \\gam
ma < 2$). A fundamental question in\nastrophysics is the stability of suc
h equilibria\, and it was believed\nthat they should be unstable for $6/5
< \\gamma < 4/3$ and stable for\n$4/3 \\le \\gamma < 2$. In this talk we
will prove that the\nNavier-Stokes-Poisson system\, perturbed around a Lan
e-Emden equilibrium\nconfiguration\, is nonlinearly unstable when $6/5 <
\\gamma < 4/3$. This\nis joint work with Juhi Jang.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140418T153000
DTEND;TZID=America/New_York:20140418T170000
LOCATION:MB315
URL:http://www.math.psu.edu/seminars/meeting.php?id=20010
SUMMARY:CCMA PDEs and Numerical Methods Seminar Series - A finite element m
ethod for the second order linear elliptic equation in non-divergence form
DESCRIPTION:Seminar: CCMA PDEs and Numerical Methods Seminar Series\nTitle:
A finite element method for the second order linear elliptic equation in
non-divergence form\nSpeaker: Wujun Zhang\, University of Maryland\nAbstra
ct Link: http://www2.math.umd.edu/~wujun/\nAbstract: Fully nonlinear ellip
tic PDEs\, including Monge-Ampere equation and Isaac's equation\, arise na
turally from differential geometry\, optimal mass transport\, stochastic g
ames and the other fields of science and engineering. In contrast to an ex
tensive PDE literature\, the numerical approximation reduces to a few pape
rs. One major difficulty is the notion of viscosity solution which hinges
on the maximum principle\, instead of a variational principle. \n\nIn this
talk\, we consider linear uniformly elliptic equations in non-divergence
form\, which may be regarded as linearization of fully nonlinear equations
. We discuss the design of convergent numerical methods for such equations
. We introduce a novel finite element method which satisfies a discrete ma
ximum principle. This property\, together with operator consistency\, guar
antees convergence to the viscosity solution provided that the coefficient
matrix and right-hand side are continuous. We also present a discrete ver
sion of the Alexandroff-Bakelman-Pucci estimate\, and use it to derive con
vergence rates under suitable regularity assumptions of the coefficient ma
trix and viscosity solution.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140425T153000
DTEND;TZID=America/New_York:20140425T170000
LOCATION:MB315
URL:http://www.math.psu.edu/seminars/meeting.php?id=20011
SUMMARY:CCMA PDEs and Numerical Methods Seminar Series - TBA
DESCRIPTION:Seminar: CCMA PDEs and Numerical Methods Seminar Series\nTitle:
TBA
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140502T153000
DTEND;TZID=America/New_York:20140502T170000
LOCATION:MB315
URL:http://www.math.psu.edu/seminars/meeting.php?id=20012
SUMMARY:CCMA PDEs and Numerical Methods Seminar Series - TBA
DESCRIPTION:Seminar: CCMA PDEs and Numerical Methods Seminar Series\nTitle:
TBA
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140509T153000
DTEND;TZID=America/New_York:20140509T170000
LOCATION:MB315
URL:http://www.math.psu.edu/seminars/meeting.php?id=20013
SUMMARY:CCMA PDEs and Numerical Methods Seminar Series - TBA
DESCRIPTION:Seminar: CCMA PDEs and Numerical Methods Seminar Series\nTitle:
TBA
END:VEVENT
END:VCALENDAR