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:20140829T153000
DTEND;TZID=America/New_York:20140829T170000
LOCATION:MB315
URL:http://www.math.psu.edu/seminars/meeting.php?id=23536
SUMMARY:CCMA PDEs and Numerical Methods Seminar Series - The A Posteriori E
rror Estimation for Finite Element Method of the H(curl)-elliptic Problem
DESCRIPTION:Seminar: CCMA PDEs and Numerical Methods Seminar Series\nTitle:
The A Posteriori Error Estimation for Finite Element Method of the H(curl
)-elliptic Problem\nSpeaker: Shuhao Cao\, Pennsylvania State University\nA
bstract: The coercive H(curl) problem\, sometimes named as H(curl)-ellipti
c\nproblem\, arises from the implicit time discretization of the\nsecond-o
rder hyperbolic initial boundary value problem for the\nelectric field. Bo
th the finite element discretization and its a\nposteriori error estimatio
n are discussed. The residual-based error\nestimator\, and several recover
y-based error estimators are constructed\nand analyzed.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140905T153000
DTEND;TZID=America/New_York:20140905T170000
LOCATION:MB315
URL:http://www.math.psu.edu/seminars/meeting.php?id=23539
SUMMARY:CCMA PDEs and Numerical Methods Seminar Series - structure-preservi
ng discretization and preconditioner for incompressible MHD equations
DESCRIPTION:Seminar: CCMA PDEs and Numerical Methods Seminar Series\nTitle:
structure-preserving discretization and preconditioner for incompressible
MHD equations\nSpeaker: Yicong Ma\, Penn State\nAbstract: When discretizi
ng MHD equations\, it is important to preserve the divergence-free conditi
on of magnetic field. A stable finite element discretization will be intro
duced\, so is a uniform solver for this discretization. Numerical results
are provided to verify the structure-preserving property and demonstrate t
he effectiveness of the solver.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140912T153000
DTEND;TZID=America/New_York:20140912T170000
LOCATION:MB315
URL:http://www.math.psu.edu/seminars/meeting.php?id=23542
SUMMARY:CCMA PDEs and Numerical Methods Seminar Series - Numerical Study of
Geometric Multigrid Methods on CPU-GPU Heterogenous Computers
DESCRIPTION:Seminar: CCMA PDEs and Numerical Methods Seminar Series\nTitle:
Numerical Study of Geometric Multigrid Methods on CPU-GPU Heterogenous Co
mputers\nSpeaker: Chunsheng Feng\, Xiangtan University\nAbstract: The geom
etric multigrid method (GMG) is one of the most efficient solution techniq
ues for\ndiscrete algebraic systems arising in many types of partial diffe
rential equations. GMG utilizes\na hierarchy of grids and discretizations
and reduces error of different frequencies simultaneously.\nGraphics proce
ssing units (GPUs) have recently burst onto the scientific computing scene
as a\ntechnology that has demonstrated substantial performance and energy
efficiency improvements.\nHowever GPU is not particularly efficient to co
arse level problems in GMG. In this work\, we\nstudy the performance of GM
G on CPU-GPU heterogenous computers. Furthermore\, for comparison\,\nwe co
mpare our method with an efficient implementation on CPUs as well as the F
ast\nFourier Transform in CuFFT.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140919T153000
DTEND;TZID=America/New_York:20140919T170000
LOCATION:MB315
URL:http://www.math.psu.edu/seminars/meeting.php?id=23545
SUMMARY:CCMA PDEs and Numerical Methods Seminar Series - A Second Order Tim
e Homogenized Model for Sediment Transport
DESCRIPTION:Seminar: CCMA PDEs and Numerical Methods Seminar Series\nTitle:
A Second Order Time Homogenized Model for Sediment Transport\nSpeaker: Sh
uonan Wu\nAbstract: A multi-scale method for the hyperbolic systems govern
ing sediment\ntransport in subcritical case is developed. The scale separa
tion of\nthis problem is due to the fact that the sediment transport is mu
ch\nslower than flow velocity. We first derive a zeroth-order homogenized
\nmodel\, and then propose a first-order correction. It is revealed that\n
that the first-order correction for hyperbolic systems has to be\napplied
on the characteristic speed of slow variables. We develop a\nsecond-order
numerical scheme following the framework of heterogeneous\nmulti-scale met
hod. The numerical results in both one and two\ndimensional cases demonstr
ate the effectiveness and efficiency of our\nmethod.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20140926T153000
DTEND;TZID=America/New_York:20140926T170000
LOCATION:MB315
URL:http://www.math.psu.edu/seminars/meeting.php?id=23548
SUMMARY:CCMA PDEs and Numerical Methods Seminar Series - High Order Nitsche
Extended FEM for Solving Interface Problem
DESCRIPTION:Seminar: CCMA PDEs and Numerical Methods Seminar Series\nTitle:
High Order Nitsche Extended FEM for Solving Interface Problem\nSpeaker: F
ei Wang\, Penn State\nAbstract Link: http://personal.psu.edu/fuw7/\nAbstra
ct: Multi-physics problems is an very active research field recently. The
most difficult part is how to couple different systems\, which means that
we have to deal with the interface\, which separates two phases of matter
\, each may be solid\, liquid\, or gaseous. The standard finite element ca
nnot achieve the optimal convergence order due to lack of resolution for t
he interface. The interface-fitted mesh can conquer this difficulty\, but
if the problem is time-dependent\, the domain need to be re-meshed each ti
me step\, which introduces interpolation error between two meshes. The ext
ended finite element method (XFEM)\, which extends the classical finite el
ement method by enriching the solution space locally around the interface
with discontinuous functions\, has shown its potential in a variety of app
lications that involve non-smooth solutions near interface. In this talk\,
we will discuss about using quadratic XFEM with Nitsche scheme to solve e
lliptic interface problem\, and try to prove the optimal convergence order
.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20141003T153000
DTEND;TZID=America/New_York:20141003T170000
LOCATION:MB315
URL:http://www.math.psu.edu/seminars/meeting.php?id=23551
SUMMARY:CCMA PDEs and Numerical Methods Seminar Series - Numerical approxim
ations and analysis for phase-field equations
DESCRIPTION:Seminar: CCMA PDEs and Numerical Methods Seminar Series\nTitle:
Numerical approximations and analysis for phase-field equations\nSpeaker:
YANG Jiang\, Penn State\nAbstract: In this presentation\, we concentrate
on numerical approximations and analysis for two phase-field equations\, n
amely the Allen-Cahn equation and the Cahn Hilliard equations. Based on th
e stabilized semi-implicit scheme\, which is unconditionally energy stable
with only first order accuracy\, we use the spectral deferred correction
(SDC) methods to produce high order accurate solutions. A local p-adaptive
strategy is proposed to balance the accuracy and overall energy stability
. Another part focuses on the numerical stability analysis for Allen-Cahn
equations. Apart from extensively studied energy stability\, we establish
the numerical maximum principle and the uniform L^2 stability for finite d
ifference methods and Fourier spectral methods\, respectively.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20141010T153000
DTEND;TZID=America/New_York:20141010T170000
LOCATION:MB315
URL:http://www.math.psu.edu/seminars/meeting.php?id=23554
SUMMARY:CCMA PDEs and Numerical Methods Seminar Series - How do dispersed i
nertial particles modify turbulent flows ?
DESCRIPTION:Seminar: CCMA PDEs and Numerical Methods Seminar Series\nTitle:
How do dispersed inertial particles modify turbulent flows ?\nSpeaker: Sa
id Elghobashi\, University of California\, Irvine\nAbstract: Turbulent flo
ws laden with inertial particles are ubiquitous in nature (e.g. aerosols i
n clouds\, and dust storms on Earth and Mars) and in industrial applicatio
ns (e.g. liquid fuel and pulverized coal sprays in combustion chambers). E
xperimental and numerical studies of these flows are quite challenging due
to the wide spectra of length- and time- scales of the dispersed particle
s in addition to the spectra of scales intrinsic to the carrier fluid turb
ulence. The two-way and and four-way nonlinear interactions between the di
spersed particles and the turbulence result in complex multi-scale physica
l phenomena. The lecture focuses on the physical mechanisms of interaction
s between dispersed spherical particles and isotropic turbulence using Dir
ect Numerical Simulation (DNS). Particles whose diameter is smaller than t
he Kolmogorov length scale are simulated as point particles. Larger partic
les with diameter of the order of Taylor microscale are fully resolved usi
ng the Immersed Boundary method.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20141017T153000
DTEND;TZID=America/New_York:20141017T170000
LOCATION:MB315
URL:http://www.math.psu.edu/seminars/meeting.php?id=23557
SUMMARY:CCMA PDEs and Numerical Methods Seminar Series - Well-posedness and
Robust Preconditioners for Discretized Fluid-Structure Interaction Syste
ms
DESCRIPTION:Seminar: CCMA PDEs and Numerical Methods Seminar Series\nTitle:
Well-posedness and Robust Preconditioners for Discretized Fluid-Structur
e Interaction Systems\nSpeaker: Kai Yang\, Penn State\nAbstract: In our wo
rk we develop a family of preconditioners for the\nlinear algebraic syste
ms arising from the arbitrary Lagrangian-Eulerian discretization of some f
luid-structure interaction models. After the time discretization\, we for
mulate the fluid-structure interaction equations as saddle point problems
and prove the uniform well-posedness. Then we discretize the space dimensi
on by finite element methods and prove their uniform well-posedness by two
different approaches under appropriate assumptions. The uniform well-pose
dness makes it possible to design robust preconditioners for the discret
ized fluid-structure interaction systems.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20141024T153000
DTEND;TZID=America/New_York:20141024T170000
LOCATION:MB315
URL:http://www.math.psu.edu/seminars/meeting.php?id=23560
SUMMARY:CCMA PDEs and Numerical Methods Seminar Series - Introduction to Pa
rallel Computing and a Parallel Programming Language CC$
DESCRIPTION:Seminar: CCMA PDEs and Numerical Methods Seminar Series\nTitle:
Introduction to Parallel Computing and a Parallel Programming Language CC
$\nSpeaker: Wenchao Guan\, Sun Yat-Sen University\nAbstract: In this talk
\, I will give a quick overview of parallel computing which covers introdu
ction to popular computing devices and supercomputers\, challenges in high
performance computing\, parallel programming models and some basic concep
ts.\nAnd then I will present CC$\, a parallel programming language for dis
tributed many-core platforms which is developed by Junfeng Wu in Sun Yet-s
en University. CC$ aims at reducing the programming complexity on distribu
ted many-core systems. The programs on CC$ machines are executed with Mult
i-BSP super-steps. And there are four key features of CC$: unified program
ming style for all levels\, built-in multi-level common address spaces\, d
escription of data access requests with expressions\, compile-time optimiz
ation for data transport. Finally I will present the performance of CC$ on
CPU-GPU Heterogenous Clusters.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20141031T153000
DTEND;TZID=America/New_York:20141031T170000
LOCATION:MB315
URL:http://www.math.psu.edu/seminars/meeting.php?id=23563
SUMMARY:CCMA PDEs and Numerical Methods Seminar Series - On computer simula
tion of multiscale processes in porous electrodes of Li-ion batteries
DESCRIPTION:Seminar: CCMA PDEs and Numerical Methods Seminar Series\nTitle:
On computer simulation of multiscale processes in porous electrodes of Li
-ion batteries\nSpeaker: Oleg Iliev\, Fraunhofer Institute for Industrial
Mathematics\, ITWM\nAbstract Link: http://www.itwm.fraunhofer.de/en/depart
ments/flow-and-material-simulation/employees/prof-dr-oleg-iliev.html\nAbst
ract: Li-ion batteries are widely used in automotive industry\, in electro
nic devices\, etc. In this talk we will discuss challenges related to the
multiscale nature of batteries\, mainly the understanding of processes in
the porous electrodes at pore scale and at macroscale. A software tool for
simulation of isothermal and non-isothermal electrochemical processes in
porous electrodes will be presented. The pore scale simulations are done o
n 3D images of porous electrodes\, or on computer generated 3D microstruct
ures\, which have the same characterization as real porous electrodes. Fin
ite Volume and Finite Element algorithms for the highly nonlinear problems
describing processes at pore level will be shortly presented. MOR and DEI
M-MOR algorithms for acceleration of the computations will be discussed. N
ext\, homogenization of the equations describing the electrochemical proce
sses at the pore scale will be presented\, and the results will be compare
d to the engineering approach based on Newmanâ€™s 1D+1D model. Simulations
at battery cell level will also be addressed. Finally\, the challenges in
modeling and simulation of degradation processes in the battery will be d
iscussed and our first simulation results in this area will be presented.
\n\nThis is joint work with A.Latz (DLR)\, M.Taralov\, V.Taralova\, J.Zaus
ch\, S.Zhang from Fraunhofer ITWM\, and Y.Efendiev from Texas A&M.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20141107T153000
DTEND;TZID=America/New_York:20141107T170000
LOCATION:MB315
URL:http://www.math.psu.edu/seminars/meeting.php?id=23566
SUMMARY:CCMA PDEs and Numerical Methods Seminar Series - Some error bounds
for the finite element approximation to the steady-state Poisson-Nernst-Pl
anck equations
DESCRIPTION:Seminar: CCMA PDEs and Numerical Methods Seminar Series\nTitle:
Some error bounds for the finite element approximation to the steady-stat
e Poisson-Nernst-Planck equations\nSpeaker: Ying Yang\, Guilin University
of Electronic Technology\nAbstract: In this talk\, we first discuss a two-
grid method for the steady-state Poisson-Nernst-Planck (PNP) equations in
the biomolecular modeling area. It is a coupled\, nonlinear and singular s
ystem. We can decouple this system by the two-grid method which can avoid
the divergence of coupled iterations for the original system. Secondly we
will present some finite element error bounds for PNP equations including
the local and global L2 norm and H1 norm error bounds.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20141114T153000
DTEND;TZID=America/New_York:20141114T170000
LOCATION:MB315
URL:http://www.math.psu.edu/seminars/meeting.php?id=23569
SUMMARY:CCMA PDEs and Numerical Methods Seminar Series - An Unfitted Hp-Int
erface Penalty Finite Element Method For Elliptic Interface Problems
DESCRIPTION:Seminar: CCMA PDEs and Numerical Methods Seminar Series\nTitle:
An Unfitted Hp-Interface Penalty Finite Element Method For Elliptic Inter
face Problems\nSpeaker: Yuanming Xiao\, Nanjing University\nAbstract: An h
p version of interface penalty finite element method (hp-IPFEM) is propose
d for elliptic interface problems in two and three dimensions on unfitted
meshes. Error estimates in broken H1 norm\, which are optimal with respect
to h and suboptimal with respect to p by half an order of p\, are derived
. Both symmetric and non-symmetric IPFEM are considered. Error estimates i
n L2 norm are proved by the duality argument.
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20141121T153000
DTEND;TZID=America/New_York:20141121T170000
LOCATION:MB315
URL:http://www.math.psu.edu/seminars/meeting.php?id=23572
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:20141128T153000
DTEND;TZID=America/New_York:20141128T170000
LOCATION:MB315
URL:http://www.math.psu.edu/seminars/meeting.php?id=23575
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:20141205T153000
DTEND;TZID=America/New_York:20141205T170000
LOCATION:MB315
URL:http://www.math.psu.edu/seminars/meeting.php?id=23578
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:20141212T153000
DTEND;TZID=America/New_York:20141212T170000
LOCATION:MB315
URL:http://www.math.psu.edu/seminars/meeting.php?id=23581
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:20141219T153000
DTEND;TZID=America/New_York:20141219T170000
LOCATION:MB315
URL:http://www.math.psu.edu/seminars/meeting.php?id=23584
SUMMARY:CCMA PDEs and Numerical Methods Seminar Series - TBA
DESCRIPTION:Seminar: CCMA PDEs and Numerical Methods Seminar Series\nTitle:
TBA
END:VEVENT
END:VCALENDAR