Jason S. Howell
Associate Teaching Professor, Director of Undergraduate Studies
Address:
6117 Wean Hall
Department of Mathematical Sciences
Carnegie Mellon University
5000 Forbes Avenue
Pittsburgh, PA 15213
P: 4122683582
Education
M.S. in Mathematical Sciences, Clemson University
Ph.D. in Mathematical Sciences, Clemson University
Research Interests
Prof. Howell's research in numerical analysis and computational mathematics is centered around several different aspects of numerical approximation of PDEs. Prof. Howell is interested in the theoretical underpinnings of the finite element method, in particular compatibility conditions for mixed methods. He is also interested in the development of finite element methods that directly approximate quantities of significant physical interest, such as fluid stresses, as well as those that relax regularity requirements. These methods are often employed for continuum models in fluid and structure dynamics. Finally, he is interested in fast and efficient linear solvers and decoupling approaches for timedependent problems.
Prof. Howell is also interested in applications of math in the sciences, and has worked with chemists and physicists on projects ranging from solubility parameters to nanostructures.
Prof. Howell is very interested in undergraduate research in Mathematical Sciences, and mentors several students in research projects each summer. The projects range from fluidstructure interaction problems to numerical linear algebra to applications of differential equations.

Current Activities: Undergraduate Research in the Mathematical Sciences; Finite Element Methods for Fluids and Structures; Applications of Differential Equations in the Natural and Social Sciences; Direct Solution Methods for Large Sparse Linear Systems; Numerical and Computational Analysis of Arterial Blood Flow; Numerical Methods for Coupled Multiscale Problems in Fluid/Fluid and Fluid/Structure Interaction.
 General Interests: Numerical and Computational Analysis; Numerical Solution of Partial Differential Equations; Computational Fluid Dynamics; Finite Element Methods; Saddle Point Problems; InfSup Conditions; Temporal Integration Methods for Systems of Ordinary Differential Equations; OperatorSplitting Methods; Defect Correction Methods; Continuation Methods; Newtonian and NonNewtonian Fluid Flow; ReactionDiffusion Equations; Flow in Porous Media; Iterative Linear and Nonlinear Solvers.
Select Publications
* indicates undergraduate coauthor
 J. S. Howell, D. Toundykov, and J. T. Webster. A cantilevered extensible beam in axial flow: Semigroup wellposedness and postflutter regimes. SIAM J. Math. Anal., 50(2), 2018,20482085. DOI
 J. S. Howell. Prestructuring sparse matrices with dense rows and columns via null space methods. Numer. Lin. Alg. Appl., 25(2), 2018, 130. DOI
 M. R. Roesing*, J. S. Howell, and D. S. Boucher. Solubility Characteristics of Poly(3hexylthiophene). J. Polym. Sci. Part B: Polym. Phys., 55 (14), 2017, 10751087. DOI
 J. S. Howell, M. R. Roesing*, and D. S. Boucher. A functional approach to solubility parameter computations. J. Phys. Chem. B, 121 (16), 2017, 41914201. DOI
 C. A. Fletcher* and J. S. Howell. Dynamic modeling of nontargeted and targeted advertising strategies in an oligopoly. Journal of Dynamics and Games 4(2), 2017, 97124. DOI
 D. S. Boucher and J. S. Howell. Solubility characteristics of PCBM and C_{60}. J. Phys. Chem. B, 120 (44), 2016, 1155611566. DOI
 N. Kuthirummal, G. Smith, L. Lopez*, R. Podila, J. S. Howell, C. Dun, and A. M. Rao. Synthesis and characterization of Arannealed zinc oxide nanostructures. AIP Advances, 6, 095225 (2016). DOI
 J. S. Howell, I. Lasiecka, and J. T. Webster. Quasistability and exponential attractors for a nongradient systemapplications to pistontheoretic plates with internal damping. Evolution Equations and Control Theory, 5(4), 2016, 567603. DOI
 J. S. Howell, M. Neilan, and N. J. Walkington. A dualmixed finite element method for the Brinkman problem. SMAI J. Comput. Math., 2, 2016, 117. DOI
 J. S. Howell and D. S. Boucher. Temperature dependence of the convex solubility parameters of organic semiconductors. J. Polym. Sci. Part B: Polym. Phys., 54(1), 2016, 8188. DOI