Current Research and Scholarly Interests


My research interests include numerical linear algebra, multiscale methods, efficient linear solvers and preconditioners for subsurface flow and mechanics modeling, parallel and high-performance computing (HPC) and architectures.

I'm a contributor to the AD-GPRS and GEOSX projects.

Lab Affiliations


All Publications


  • A two-stage preconditioner for multiphase poromechanics in reservoir simulation COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING White, J. A., Castelletto, N., Klevtsov, S., Bui, Q. M., Osei-Kuffuor, D., Tchelepi, H. A. 2019; 357
  • Multiscale two-stage solver for Biot’s poroelasticity equations in subsurface media Computational Geosciences Castelletto, N., et al 2018: 1-18
  • Block-preconditioned Krylov Methods for Coupled Multiphase Reservoir Flow and Geomechanics European Conference on Mathematics of Oil Recovery Klevtsov, S., Castelletto, N., White, J. A., Tchelepi, H. A. 2016