Rolf J. Ryham

Associate Professor
Associate Chair
Department of Mathematics
Fordham University
rryham@fordham.edu
Office: JMH 413
(718) 817-3228

Research Interests

Partial differential equations and scientific computing

Education

The Pennsylvania State University, Ph.D., Mathematics, 2006
University of Georgia, B.S., Mathematics, 2001

Teaching

Spring 2023
MATH 2011 Programming for Math and Science
MATH 3002 Differential Equations

Publications

Effects of Tunable Hydrophobicity on the Collective Hydrodynamics of Janus Particles under Flows
S.-P. Fu, B. Quaife, R. J. Ryham, Y.-N. Young
arXiv:2208.03549, 2022 BibTeX

Two-Dimensional Vesicle Hydrodynamics from Hydrophobic Attraction Potential
S.-P. Fu, B. Quaife, R. J. Ryham, Y.-N. Young
Journal of Fluid Mechanics, Volume 941, 2022, A41 BibTeX

Simulation of multiscale hydrophobic lipid dynamics via efficient integral equation methods
S.-P. Fu, R. J. Ryham, A. Klöckner, M. Wala, S. Jiang, Y.-N. Young
Multiscale Modeling & Simulation, 18(1), 2020, 79—103 BibTeX

Boundary asymptotics for a non-neutral electrochemistry model with small Debye length
C.-C. Lee and R. J. Ryham
Zeitschrift für angewandte Mathematik und Physik, 69(2), 2018, 41 BibTeX

On the viscous flows of leak-out and spherical cap natation
R. J. Ryham
Journal of Fluid Mechanics, Volume 836, 2018, 502—531 BibTeX

Social media mention
Tu peux peut-être leur raconter cette histoire: Dans mon papier de thèse avec Brochard & PGG on s'est trompé d'un facteur 8 sur la détermination de la viscosité des membranes lipidiques jusqu'à ce qu'un prof de maths du Bronx corrige le préfacteur du modèle! https://t.co/EUTdp31QOe

— olivetree aka Olivier Sandre (@Olive_Free) January 3, 2018


The hemifusion structure induced by influenza virus haemagglutinin is determined by physical properties of the target membranes
P. Chlanda, E. Mekhedov, H. Waters, C. L. Schwartz, E. R. Fischer, R. J. Ryham, F. S. Cohen, P. S. Blank and J. Zimmerberg
Nature Microbiology, 1, 2016, 16050 BibTeX

Calculating Transition Energy Barriers and Characterizing Activation States for Steps of Fusion
R. J. Ryham, T. S. Klotz, L. Yao and F. S. Cohen
Biophysical Journal 110, 2016, 1110—1124 BibTeX

Stokes Flow for a Shrinking Pore
C. A. Aubin and R. J. Ryham
Journal of Fluid Mechanics, Voluem 788, 2016, 228—245 BibTeX

Very Weak Solutions for Poisson-Nernst-Planck System
J. Hineman and R. J. Ryham
Nonlinear Analysis: Theory, Methods & Applications, 115, 2015, 12—24 BibTeX
The Aqueous Viscous Drag of a Contracting Open Surface
F. S. Cohen and R. J. Ryham
Physics of Fluids, 26(2), 2014, 023101 BibTeX Preprint

Teardrop Shapes Minimize Bending Energy of Fusion Pores Connecting Planar Bilayers
R. J. Ryham, M. Ward and F. S. Cohen
Physical Review E, 88, 2013, 062701 BibTeX

Cutting Corners in Michell Trusses
E. Figueroa, A. Hill, D. Iusco and R. J. Ryham
Portugaliae Mathematica, 69,2012, 95—112 BibTeX

A Dynamic Model of Open Vesicles in Fluids
R. J. Ryham, F. S. Cohen and R. Eisenberg
Communications in Mathematical Sciences, 10, 2012, 1273—1285 BibTeX

Aqueous Viscosity is the Primary Source of Friction in Lipidic Pore Dynamics
R. J. Ryham, I. Berezovik, and F. S. Cohen
Biophysical Journal, 101, 2011, 2929—2938 BibTeX

Energetic variational approaches in modeling vesicle and fluid interactions
Q. Du, C. Liu, R. J. Ryham and X. Wang
Physica D, 238, 2009, 923—930 BibTeX
Existence, Uniqueness, Regularity and Long-term Behavior for Dissipative Systems Modeling Electrohydrodynamics
R. J. Ryham
arXiv:0910.4973, 2009 BibTeX
Mathematical models for the deformation of electrolyte droplets
R. J. Ryham, C. Liu, and L. Zikatanov
Discrete and Continuous Dynamical Systems B, 8, 2007, 649—661 BibTeX

Diffuse interface energies capturing the Euler number: relaxation and renormalization
Q. Du, C. Liu, R. J. Ryham and X. Wang
Communications in Mathematical Sciences, 5, 2007, 233—242 BibTeX
On electro-kinetic fluids: one dimensional configurations
R. J. Ryham, C. Liu and Z.-Q. Wang
Discrete and Continuous Dynamical Systems B, 6, 2006, 357—371 BibTeX
Modeling the spontaneous curvature effects in static cell membrane deformations by a phase field formulation
Q. Du, C. Liu, R. J. Ryham and X. Wang
Communications on Pure andĀ Applied Analysis, 4, 2005, 537—548 BibTeX
A phase field formulation of the Willmore problem
Q. Du, C. Liu, R. J. Ryham and X. Wang
Nonlinearity, 18, 2005, 1249—1267 BibTeX
An Energetic Variational Approach to Mathematical Modeling of Charged Fluids: Charged Phases, Simulation and Well Posedness
R. J. Ryham
Ph.D. Dissertation, The Pennsylvania State University, 2006 BibTeX