Conference Talks
A student under my supervision is marked with a star, and the speaker is underlined.
2024
S. R. Kumar, K. Adhikari*, K. B. Nakshatrala, and J. F. Patrick, “Rectifying efficiency measures for vascular-based thermal regulation in fiber-reinforced polymer composites," 39th Annual Technical Conference, American Society for Composites, San Diego, October 21--23, 2024.
J. Turicek, Z. Phillips, K. B. Nakshatrala, and J. F. Patrick, “Exceeding structural lifetimes: Asymptotic self-healing in fiber-reinforced polymer composites," 39th Annual Technical Conference, American Society for Composites, San Diego, October 21--23, 2024.
2023
K. Adhikari*, and K. B. Nakshatrala, “Adjoint-based sensitivity analysis for thermal regulation via fluid flow in thin vascular systems," 17th US National Congress on Computational Mechanics, Albuquerque, July 23--27, 2023. [Got a student travel award from USACM.]
K. Adhikari*, and K. B. Nakshatrala, “Material design for thermal regulation in vascular systems using topology optimization," Engineering Mechanics Institute (EMI) Conference, Atlanta, June 6--9, 2023.
2019
M. S. Joshaghani*, and K. B. Nakshatrala, “A modeling framework for coupled plasticity and species diffusion with application to degradation," Engineering Mechanics Institute (EMI) Conference, Pasadena, June 18--21, 2019.
H. W. Huang*, K. B. Nakshatrala, C. Merino, K. Ruiz, and Y. L. Mo, “Periodic barriers for seismic hazard mitigation of civil infrastructures," Engineering Mechanics Institute (EMI) Conference, Pasadena, June 18--21, 2019.
R. Nannapaneni*, K.B. Nakshatrala, K. Krakowiack, “Modeling the effect of micro-structure on ultrasonic wave propagations," Engineering Mechanics Institute (EMI) Conference, Pasadena, June 18--21, 2019.
M. S. Joshaghani*, and K. B. Nakshatrala, “A scalable parallel implementation of double porosity/permeability model," SIAM Conference on Mathematical & Computational Issues in the Geosciences (GS19), Houston, March 11--14, 2019.
A. Bessmertnykh, E. Dontsov, and K. B. Nakshatrala, “Semi-infinite fracture driven by Herschel-Bulkley fluid," SIAM Conference on Mathematical & Computational Issues in the Geosciences (GS19), Houston, March 11--14, 2019.
M. S. Joshaghani*, J. Chang, K. B. Nakshatrala, and M. Knepley, “On composable block solvers and performance spectrum model for the four-field double porosity/permeability model," SIAM Conference on Computational Science & Engineering (CSE19), Spokane, February 25--March 1, 2019. [Got a student travel award from SIAM.]
2018
M. S. Joshaghani*, S. H. S. Joodat*, and K. B. Nakshatrala, “A stabilized mixed DG formulation for flow in porous media with double pore-networks," Engineering Mechanics Institute (EMI) Conference, Boston, May 29--June 1, 2018. [Presentation & Student poster competition] [Winner of Computational Mechanics Student Competition at EMI 2018, Boston.] (UH eNews Coverage)
2017
S. H. S. Joodat*, K. B. Nakshatrala, and R. Ballarini, “A computational framework to model flow in porous media with multiple pore-networks," Engineering Mechanics Institute (EMI) Conference, San Diego, June 4--7, 2017. [Student poster competition]
S. H. S. Joodat*, K. B. Nakshatrala, and R. Ballarini, “A framework to model flow in porous media with multiple pore-networks," Engineering Mechanics Institute (EMI) Conference, San Diego, June 4--7, 2017. [Conference talk]
J. Chang*, K. B. Nakshatrala, M. Knepley, and L. Johnsson, “A performance spectrum for parallel computational frameworks for solving PDEs," Firedrake '17 Workshop, Imperial College, London, March 27--28, 2017.
2016
J. Chang*, and K. B. Nakshatrala, “Operator-splitting and variational inequalities for non-negative solutions of advection-diffusion equations,” American Geophysical Union (AGU) Fall Meeting, San Francisco, California, December 12--16, 2016.
M. Shabouei*, and K.B. Nakshatrala, “Miscible viscous fingering in porous media with multiple pore-networks," American Geophysical Union (AGU) Fall Meeting, San Francisco, California, December 12--16, 2016.
M. K. Mudunuru, S. Karra, and K. B. Nakshatrala, "Scaling laws and reduced-order models for mixing and reactive-transport in heterogeneous anisotropic porous media," American Geophysical Union (AGU) Fall Meeting, San Francisco, December 12--16, 2016.
S. H. S. Hanie*, K. B. Nakshatrala, and R. Ballarini, “Modeling flow in porous media with double porosity/permeability,” American Geophysical Union (AGU) Fall Meeting, San Francisco, California, December 12--16, 2016.
M. K. Mudunuru, K. B. Nakshatrala, and S. Karra, "Preserving physical and mathematical properties under reduced-order modeling for flow and transport in porous media," XXI International Conference Computational Methods in Water Resources (CMWR 2016), University of Toronto, Canada, June 20--24, 2016.
M. Shabouei*, and K. B. Nakshatrala, "Effect of temperature and performance of stabilized formulations for viscous fingering and mixing in porous media," Engineering Mechanics Institute (EMI) Conference, Vanderbilt University, May 22--25, 2016.
C. Xu*, and K. B. Nakshatrala, "Degradation of materials and structures due to temperature and moisture: Semi-analytical solutions, computational framework, and numerical solutions," Engineering Mechanics Institute (EMI) Conference, Vanderbilt University, May 22--25, 2016.
S. Karimi*, and K. B. Nakshatrala, "A hybrid multi-scale computational framework for transport problems in porous media," Engineering Mechanics Institute (EMI) Conference, Vanderbilt University, May 22--26, 2016.
J. Chang*, and K. B. Nakshatrala, "Performance model for finite element formulations," The 7th Annual Scientific Software Days Conference, Austin, February 25--26, 2016. [Poster presentation]
2015
J. Chang*, and K. B. Nakshatrala, "A new approach to enforce element-wise mass/species balance using the augmented Lagrangian method," American Geophysical Union (AGU) Fall Meeting, December 14--18, 2015. [Poster presentation]
M. K. Mudunuru*, S. Shabouei*, and K. B. Nakshatrala, "A locally conservative non-negative finite element formulation for anisotropic advective-diffusive-reactive systems," American Geophysical Union (AGU) Fall Meeting, December 14--18, 2015. [Poster presentation]
C. Xu*, and K. B. Nakshatrala, "Chemical degradation of hyperelastic solids: Mathematical model and coupling algorithms," ASME International Mechanical Engineering Congress and Exposition (IMECE), Houston, November 13--19, 2015. [Oral presentation]
M. K. Mudunuru*, M. Shabouei*, and K. B. Nakshatrala, "On local and global species conservation errors for nonlinear ecological models and chemical reacting flows," ASME International Mechanical Engineering Congress and Exposition (IMECE), Houston, November 13--19, 2015. [Oral presentation]
J. Chang*, S. Karra, and K. B. Nakshatrala, "Enhanced predictive capabilities of large-scale subsurface flow and transport," ASME International Mechanical Engineering Congress and Exposition (IMECE), Houston, November 13--19, 2015. [Oral presentation]
M. Shabouei*, and K. B. Nakshatrala, "A posteriori error estimation techniques to verify numerical solutions in porous media models," ASME International Mechanical Engineering Congress and Exposition (IMECE), Houston, November 13--19, 2015. [Oral presentation]
J. Chang*, K. B. Nakshatrala, and L. Johnsson, "A comparative study on the computational efficiency of locally conservative finite element methods for subsurface flows," 13th US National Congress on Computational Mechanics (USNCCM), San Diego, July 26--30, 2015. [Student poster competition & Oral presentation]
K. B. Nakshatrala, C. Xu*, and M. K. Mudunuru*, "On designing staggered coupling algorithms for modeling degradation of materials," 13th US National Congress on Computational Mechanics (USNCCM), San Diego, July 26--30, 2015. [Oral presentation]
J. Chang*, K. B. Nakshatrala, and S. Karra, "Large-scale optimization-based non-negative computational framework for diffusion equations: Parallel implementation and performance studies," PETSc Conference and Tutorial, Argonne National Laboratory, Chicago, June 15--18, 2015.
J. Chang*, K. B. Nakshatrala, and L. Johnsson, "A comparative study on the computational efficiency of locally conservative finite element methods for subsurface flows," High-Performance Computing in Fluid Flow symposium, The 18th International Conference on Finite Elements in Flow Problems (FEF 2015), Taipei, Taiwan, March 16--18, 2015. [Oral presentation]
S. Karimi*, and K. B. Nakshatrala, "Monolithic multi-time-step coupling methods for first and second-order transient systems," SIAM Conference on Computational Science & Engineering (CSE15), March 14--18, 2015. [Poster presentation]
S. Karimi*, and K. B. Nakshatrala, "Monolithic multi-time-step coupling methods for transient systems," SIAM Conference on Computational Science & Engineering (CSE15), March 14--18, 2015. [Oral presentation]
2014
K. B. Nakshatrala, "On enforcing maximum principles, comparison principles and the non-negative constraint for linear/nonlinear and steady-state/transient diffusion-type equations," American Geophysical Union (AGU) Fall Meeting, December 15--19, 2014. [Poster presentation]
S. Karimi*, and K. B. Nakshatrala, "A monolithic multi-time-step computational framework for transient advective-diffusive-reactive," American Geophysical Union (AGU) Fall Meeting, December 15--19, 2014. [Poster presentation]
S. Karra, J. Chang*, and K. B. Nakshatrala, "On the performance of maximum-principle enforcing methods applied to large-scale subsurface problems," American Geophysical Union (AGU) Fall Meeting, December 15--19, 2014. [Poster presentation]
J. Chang*, and K. B. Nakshatrala, "A methodology to ensure local mass conservation for porous media models under finite element formulations based on convex optimization," American Physical Union (AGU) Fall Meeting, December 15--19, 2014. [Poster presentation]
S. Karimi*, and K. B. Nakshatrala, "Monolithic multi-time-step coupling methods for transient problems in solid mechanics and transport," Experimental and Computational Nonlinear Dynamics session, 51st SES Annual Technical Meeting, Purdue University, October 1--3, 2014. [Oral presentation]
S. Karimi*, and K. B. Nakshatrala, "On the development and performance of multi-time-step coupling methods for transient multi-scale problems," Experimental and Computational Nonlinear Dynamics session, 51st SES Annual Technical Meeting, Purdue University, October 1--3, 2014. [Student poster competition]
S. Karimi*, and K. B. Nakshatrala, "Monolithic multi-time-step coupling methods for second-order transient systems," 17th US National Congress on Theoretical and Applied Mechanics (USNCTAM), Michigan State University, June 15--20, 2014. [Conference talk and extended abstract]
M. K. Mudunuru*, and K. B. Nakshatrala, "On mesh restrictions for mixed formulations for anisotropic diffusion equation in high contrast heterogeneous media," 17th US National Congress on Theoretical and Applied Mechanics (USNCTAM), Michigan State University, June 15--20, 2014. [Conference talk and extended abstract]
J. Chang*, and K. B. Nakshatrala, "Computational performance of locally conservative methods for large-scale flow and transport problems through porous media," 17th US National Congress on Theoretical and Applied Mechanics (USNCTAM), Michigan State University, June 15--20, 2014. [Conference talk and extended abstract]
2013
K. B. Nakshatrala, "Importance of non-negative numerical solutions in degradation modeling, groundwater modeling, and reactive transport," 12th US National Congress on Computational Mechanics, Raleigh, North Carolina, July 22--25, 2013.
M. K. Mudunuru*, C. Xu*, and K. B. Nakshatrala, "On modeling thermal and moisture degradation of materials and structures," 12th US National Congress on Computational Mechanics, Raleigh, North Carolina, July 22--25, 2013. [Oral presentation]
M. K. Mudunuru*, and K. B. Nakshatrala, "On mesh restrictions for advective-diffusive-reactive systems to achieve non-negative solutions," 12th US National Congress on Computational Mechanics, Raleigh, North Carolina, July 22--25, 2013. [Student poster competition]
M. Martinez, D. Z. Turner, and K. B. Nakshatrala, "A new framework for coupling flow and deformation of the porous solid," 12th US National Congress on Computational Mechanics, Raleigh, North Carolina, July 22--25, 2013. [Oral presentation]
J. Chang*, and K. B. Nakshatrala, “On modifications to Darcy model and associated mixed formulations," 12th US National Congress on Computational Mechanics, Raleigh, North Carolina, July 22--25, 2013. [Oral presentation & Student poster competition]
S. Karimi*, and K. B. Nakshatrala, “Monolithic vs. staggered coupling algorithms for first- and second-order transient systems," 12th US National Congress on Computational Mechanics, Raleigh, North Carolina, July 22--25, 2013. [Oral presentation]
S. Karimi*, and K. B. Nakshatrala, “On multi-time-step coupling for linear first- and second-order transient systems," 12th US National Congress on Computational Mechanics, Raleigh, North Carolina, July 22--25, 2013. [Student poster competition]
A. J. Valocchi, and K. B. Nakshatrala, “Importance of non-negative numerical solution for mixing-controlled reactive transport," SIAM Conference on Mathematical & Computational Issues in the Geosciences, University of Padova, Italy, June 17--20, 2013.
M. K. Mudunuru*, K. B. Nakshatrala, and A. J. Valocchi, "A robust non-negative numerical framework for diffusion-controlled bimolecular-reactive systems," SIAM Conference on Computational Science and Engineering (SIAM CSE13), Boston, February 25--March 1, 2013.
2012
J. N. Reddy, K. B. Nakshatrala, and J. Chang*, “Least-squares finite element formulations for flow problems,” American Geophysical Union (AGU) Fall Meeting, San Francisco, California, December 3--7, 2012. [An invited talk]
K. B. Nakshatrala, “Optimization-based methodology for enforcing maximum principles and the non-negative constraint,” American Geophysical Union (AGU) Fall Meeting, San Francisco, California, December 3--7, 2012.
M. K. Mudunuru*, and K. B. Nakshatrala, “On achieving element-wise species balance and enforcing non-negative constraint for advection-diffusion equation,” American Geophysical Union (AGU) Fall Meeting, San Francisco, California, December 3--7, 2012.
K. B. Nakshatrala, “Numerical modeling of diffusive-reactive systems,” ASME International Mechanical Engineering Congress & Exposition, Houston, Texas, November 9--15, 2012.
M. K. Mudunuru*, and K. B. Nakshatrala, “Modeling moisture degradation of structural members,” ASME International Mechanical Engineering Congress & Exposition (Special Session on Environmental effects and failure of engineering structures), Houston, Texas, November 9--15, 2012.
2011
K. B. Nakshatrala, “A methodology for enforcing maximum principles and the non-negative constraint for diffusion-type equations,” 11th US National Congress on Computational Mechanics, Minneapolis, Minnesota, July 25--28, 2011.
M. K. Mudunuru*, and K. B. Nakshatrala, “A mathematical model and computational framework for degradation / healing of materials and structures,” 11th US National Congress on Computational Mechanics, Minneapolis, Minnesota, July 25--28, 2011.
G. S. Payette, K. B. Nakshatrala, and J. N. Reddy, “On the performance of high-order finite element models with respect to maximum principles and the non-negative constraint,” 11th US National Congress on Computational Mechanics, Minneapolis, Minnesota, July 25--28, 2011.
2010
D. Z. Turner, P. K. Notz, and K. B. Nakshatrala, “On the performance of Raviart-Thomas and variational multiscale finite element formulations for flow in heterogeneous materials,” ASME International Mechanical Engineering Congress and Exposition, Vancouver, Canada, November 12--18, 2010.
K. B. Nakshatrala, “A computational framework for coupled deformation - diffusion analysis,” 16th US National Congress of Theoretical & Applied Mechanics, State College, Pennsylvania, June 27 -- July 2, 2010.
S. Srinivasan*, and K. B. Nakshatrala, “Stabilized formulations for modified Brinkman equation,” 16th US National Congress of Theoretical & Applied Mechanics, State College, Pennsylvania, June 27 -- July 2, 2010.
2009
A. J. Valocchi, and K. B. Nakshatrala, “Reactions across transverse mixing zones in heterogeneous aquifers: Using effective dispersion coefficients and multi-scale finite element methods,” Reactive Transport and Mixing in Complex Environments: Recent Advances in Theory and Experiments, American Geophysical Union (AGU) Fall Meeting, San Francisco, California, December 14 -- December 18, 2009.
K. B. Nakshatrala, “Non-negative mixed finite element formulations for tensorial diffusion equation,” Stabilized Methods and Their Applications Session, ASME International Mechanical Congress and Exposition, Lake Buena Vista, Florida, November 13 -- 19, 2009.
2008
K. B. Nakshatrala, and A. J. Valocchi, “A multiscale finite element framework for reactive contaminant transport in heterogeneous porous media,” Advances in the theory and simulation of flow through porous media Session, ASME International Mechanical Congress and Exposition, Boston, Massachusetts, October 31 -- November 6, 2008.
K. B. Nakshatrala, and A. J. Valocchi, “On domain decomposition techniques and coupling algorithms for first- and second-order transient systems,” Stabilized and multiscale methods in fluid mechanics Session, ASME International Mechanical Congress and Exposition, Boston, Massachusetts, October 31 -- November 6, 2008.
D. Z. Turner, K. B. Nakshatrala, and K. D. Hjelmstad, “A Newton-Schur type finite element formulation for Navier-Stokes with applications in nonlinear fluid-structure interaction,” 45th Annual Technical Meeting, Society of Engineering Science, Urbana, Illinois, October 12 -- 15, 2008.
K. B. Nakshatrala, and A. J. Valocchi, “A multiscale finite element framework for simulating reactive contaminant transport in heterogeneous porous media,” Computational Methods in Water Resources, San Francisco, California, July 6--10, 2008.
K. B. Nakshatrala, and A. J. Valocchi, “A survey on non-negative numerical formulations for tensorial diffusion equation,” Computational Methods in Water Resources, San Francisco, California, July 6--10, 2008.
P. C. Lichtner, C. Lu, G. E. Hammond, B. Philip, J. D. Moulton, R. T. Mills, B. F. Smith, A. J. Valocchi, K. Nakshatrala, and S. Yabusaki, "The next-generation massively parallel reactive flow and transport code PFLOTRAN: Application to CO2 storage in saline aquifers," Joint BES-BER-ASCR-FE Research Symposium on Basic Research Relevant to CO2 Sequestration, Gaithersburg, Maryland, March 2008. [Poster session]
2008
A. J. Valocchi, and K. B. Nakshatrala, “Investigation of numerical upscaling techniques for mixing controlled reactions in heterogeneous media,” American Geophysical Union (AGU) Fall Meeting, San Francisco, California, December 10--14, 2007.
2006
K. B. Nakshatrala, K. D. Hjelmstad, and D. A. Tortorelli, “Partitioned coupling algorithms for multi-physics problems,” 7th World Congress on Computational Mechanics, Los Angeles, California, July 16--22, 2006.
2005
A. Namazifard, K. Nakshatrala, B. Wasistho, D. Tortorelli, and K. Hjelmstad, “On some coupling algorithms for fluid-structure interaction problems,” 8th US National Congress on Computational Mechanics, Austin, Texas, July 25--27, 2005.