Applied/Physical Applied Math: Difference between revisions

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= Physical Applied Math Group Meeting =
= Physical Applied Math Group Meeting =


*'''When:''' Thursdays at 4:00pm (unless there is a [https://www.math.wisc.edu/deptmeetings Department Meeting])
*'''When:''' Wednesdays at 4:00pm in VV 901
*'''Where:''' [https://us.bbcollab.com/guest/0ad27f42c51d4ffbbdff719013f16acd BBCollaborate Ultra] <s>901 Van Vleck Hall</s>
*'''Where:''' 901 Van Vleck Hall
*'''Organizers:''' [http://www.math.wisc.edu/~spagnolie Saverio Spagnolie] and [http://www.math.wisc.edu/~jeanluc Jean-Luc Thiffeault]
*'''Organizers:''' [https://people.math.wisc.edu/~chr/ Chris Rycroft], [http://www.math.wisc.edu/~spagnolie Saverio Spagnolie] and [http://www.math.wisc.edu/~jeanluc Jean-Luc Thiffeault]
*'''To join the Physical Applied Math mailing list:''' See the [https://admin.lists.wisc.edu/index.php?p=11&l=phys_appl_math mailing list website].
*'''Announcements:''' Contact the organizers to join this meeting


== Spring 2020 ==
== Fall 2024 ==
    
    
{| cellpadding="8"
{| cellpadding="8"
!align="left" | date
!align="left" | Date
!align="left" | speaker
!align="left" | Speaker
!align="left" | title
!align="left" | Title
|-
|-
|Jan. 30
|Sep 11
|Jean-Luc
|Spagnolie
|Organizational meeting; [https://www.dropbox.com/s/bnjpyud6h8u3lav/homog_periodic_lattice_group_meeting.pdf?dl=0 Homogenization of a periodic lattice]
|Growth and buckling of filaments in viscous fluids, Part I
|-
|-
|Feb. 6
|Sep 18
|Gage
|Ohm
|Krasilov et al., [https://bura.brunel.ac.uk/bitstream/2438/419/1/Growing%20Random%20Sequences.pdf Growing random sequences]<br> Makover and McGowan, [https://arxiv.org/abs/math/0510159 An elementary proof that random Fibonacci sequences grow exponentially]
|Rods in flows: from geometry to fluids
|-
|-
|Feb. 13
|Sep 25
|–
|
|
|''Faculty Meeting''
|-
|-
|Feb. 20
|Oct 2
|Saverio
|Arthur Young (Rycroft Group)
|Greengard and Jiang, [https://epubs.siam.org/doi/abs/10.1137/18M1216158 A New Mixed Potential Representation for Unsteady, Incompressible Flow]
|Multiphase Taylor–Couette flow transitions
|-
|-
|Feb. 27
|Oct 9
|
|Albritton
|''Faculty (EC) Meeting''
|I thought we already knew everything about shear flows?
|-
|-
|Mar. 5
|Oct 16
|Wil
|Chandler
|[https://www.dropbox.com/s/fbidvoslu3twtlv/pam_2020.pdf?dl=0 Implicit surfaces and the closest point problem]
|Investigating active liquid crystals using an immersed deformable body
|-
|-
|Mar. 12
|Oct 23
|''cancelled''
|Ohm
|
|
|-
|-
|Mar. 19
|Oct 30
|Saverio
|Thiffeault
|[https://www.dropbox.com/s/h9rmglss07bmyb6/BonusLecture.pdf?dl=0 Primer on SIR models and the epidemic]
|<s>Maxey-Riley equation for active particles</s> Time-dependent reciprocal theorem
|-
|Mar. 26 ''3:30pm''
|Jean-Luc
|[https://youtu.be/B0GNtFApUQ8 Shape Matters: Homogenization for a confined Brownian microswimmer] (seminar at Princeton)
|-
|-
|Apr. 2
|Nov 6
|–
|
|
|''Faculty Meeting''
|-
|-
|Apr. 9
|Nov 13
|Ruifu
|Ahmad Zaid Abassi
|Texier, [https://arxiv.org/abs/1907.08512 Fluctuations of the product of random matrices and generalised Lyapunov exponent] [https://www.dropbox.com/s/xb0jb833xzpmtdj/Ruifi_group_meeting.pdf?dl=0 notes]
(UC Berkeley)
|Finite-depth standing water waves: theory, computational algorithms, and rational approximations
|-
|-
|Apr. 16
|Nov 20
|Jean-Luc
|Jingyi Li
|[https://www.dropbox.com/s/u66adsybjai7j5k/dumbbell_fluct.pdf Fluctuating dummbell swimmer]
|Arrested development and traveling waves of active suspensions in nematic liquid crystals
|-
|-
|Apr. 23
|Nov 27
|
|''Thanksgiving''
|
|
|-
|-
|Apr. 30
|Dec 4
|
|Thiffeault
|
|
|-
|-
|}
|}
== Abstracts ==
=== '''Ahmad Abassi, University of California, Berkeley''' ===
Title: Finite-depth standing water waves: theory, computational algorithms, and rational approximations
We generalize the semi-analytic standing-wave framework of Schwartz and Whitney (1981) and Amick and Toland (1987) to finite-depth standing gravity waves. We propose an appropriate Stokes-expansion ansatz and iterative algorithm to solve the system of differential equations governing the expansion coefficients. We then present a more efficient algorithm that allows us to compute the asymptotic solution to higher orders. Finally, we conclude with numerical simulations of the algorithms implemented in multiple-precision arithmetic on a supercomputer to study the effects of small divisors and the analytic properties of rational approximations of the computed solutions. This is joint work with Jon Wilkening (UC Berkeley).


== Archived semesters ==
== Archived semesters ==
*[[Applied/Physical Applied Math/Spring2024|Spring 2024]]
*[[Applied/Physical_Applied_Math/Fall2023|Fall 2023]]
*[[Applied/Physical_Applied_Math/Fall2021|Fall 2021]]
*[[Applied/Physical_Applied_Math/Spring2021|Spring 2021]]
*[[Applied/Physical_Applied_Math/Fall2020|Fall 2020]]
*[[Applied/Physical_Applied_Math/Summer2020|Summer 2020]]
*[[Applied/Physical_Applied_Math/Spring2020|Spring 2020]]
*[[Applied/Physical_Applied_Math/Fall2019|Fall 2019]]
*[[Applied/Physical_Applied_Math/Fall2019|Fall 2019]]
*[[Applied/Physical_Applied_Math/Spring2019|Spring 2019]]
*[[Applied/Physical_Applied_Math/Spring2019|Spring 2019]]

Latest revision as of 17:50, 14 November 2024

Physical Applied Math Group Meeting

Fall 2024

Date Speaker Title
Sep 11 Spagnolie Growth and buckling of filaments in viscous fluids, Part I
Sep 18 Ohm Rods in flows: from geometry to fluids
Sep 25 –
Oct 2 Arthur Young (Rycroft Group) Multiphase Taylor–Couette flow transitions
Oct 9 Albritton I thought we already knew everything about shear flows?
Oct 16 Chandler Investigating active liquid crystals using an immersed deformable body
Oct 23 Ohm
Oct 30 Thiffeault Maxey-Riley equation for active particles Time-dependent reciprocal theorem
Nov 6 –
Nov 13 Ahmad Zaid Abassi

(UC Berkeley)

Finite-depth standing water waves: theory, computational algorithms, and rational approximations
Nov 20 Jingyi Li Arrested development and traveling waves of active suspensions in nematic liquid crystals
Nov 27 Thanksgiving
Dec 4 Thiffeault

Abstracts

Ahmad Abassi, University of California, Berkeley

Title: Finite-depth standing water waves: theory, computational algorithms, and rational approximations

We generalize the semi-analytic standing-wave framework of Schwartz and Whitney (1981) and Amick and Toland (1987) to finite-depth standing gravity waves. We propose an appropriate Stokes-expansion ansatz and iterative algorithm to solve the system of differential equations governing the expansion coefficients. We then present a more efficient algorithm that allows us to compute the asymptotic solution to higher orders. Finally, we conclude with numerical simulations of the algorithms implemented in multiple-precision arithmetic on a supercomputer to study the effects of small divisors and the analytic properties of rational approximations of the computed solutions. This is joint work with Jon Wilkening (UC Berkeley).

Archived semesters


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