# Publications

## Peer-reviewed articles

- Mahadevan, V. S., Grindeanu, I., Jacob, R., and Sarich, J.: Improving climate model coupling through a complete mesh representation: a case study with E3SM (v1) and MOAB (v5.x), Geosci. Model Dev. Discuss., https://doi.org/10.5194/gmd-2018-280, in review, 2018.
- Ray, N., Grindeanu, I., Zhao, X., Mahadevan, V. and Jiao, X., 2017. Array-based, parallel hierarchical mesh refinement algorithms for unstructured meshes. Computer-Aided Design, 85, pp.68-82.
- Ray, N., Grindeanu, I., Zhao, X., Mahadevan, V. and Jiao, X., 2015. Array-based hierarchical mesh generation in parallel. Procedia Engineering, 124, pp.291-303.
- Zhao, X., Conley, R., Ray, N., Mahadevan, V.S. and Jiao, X., 2015. Conformal and non-conformal adaptive mesh refinement with hierarchical array-based half-facet data structures. Procedia Engineering, 124, pp.304-316.
- Mahadevan VS, Merzari E, Tautges TJ, Jain R, Obabko A, Smith MA, Fischer P., “High-resolution coupled physics solvers for analysing fine-scale nuclear reactor design problems”, Theme Issue on Multi-scale systems in fluids and soft matter: approaches, numerics and applications, Phil. Trans. R. Soc. A
**372**: 20130381, 2021, June 2014. - S. Cai, T. J. Tautges, “One-to-one sweeping based on harmonic S-T mappings of facet meshes and their cages”, Engineering with Computers, 1-14, Aug 2014.
- L. Kaczmarczyk, MM Nezhad, C. Pearce, “Three-dimensional brittle fracture: configurational-force-driven crack propagation”, International Journal for Numerical Methods in Engineering,
**97**,*7*, 531–550, Jan 2014. - N. Ray, T. Delaney, D. Einstein, X. Jiao, (2014). “Surface remeshing with robust high-order reconstruction”, Engineering with Computers,
**30**, 487-502. - V. Dyedov, N. Ray, D. Einstein, X. Jiao, T. J. Tautges, (2014). “AHF: array-based half-facet data structure for mixed-dimensional and non-manifold meshes”, Engineering with Computers,
**1-16**. - R. Jacob, J. Krishna, X. Xu, T. J. Tautges, I. Grindeanu, R. Latham, K. Peterson, P. Bochev, M. Haley, D. Brown, R. Brownrigg, D. Shea, W. Huang, D. Middleton, (2013). “ParNCL and ParGAL: Data-parallel Tools for Postprocessing of Large-scale Earth Science Data”, Procedia Computer Science,
**18**, 1245-1254, ISSN 1877-0509. - M. Yan, K. Jordan, D. Kaushik, M. Perrone, V. Sachdeva, T. J. Tautges, J. Magerlein, (2012). “Coupling a Basin Modeling and a Seismic Code using MOAB”, Procedia Computer Science,
**9**, 986-993, ISSN 1877-0509, http://dx.doi.org/10.1016/j.procs.2012.04.105. - Tim D. Bohm, Mohamed E. Sawan, Steve T. Jackson, Paul P.H. Wilson, (2012). “Detailed nuclear analysis of ITER ELM coils”, Tenth International Symposium on Fusion Nuclear Technology (ISFNT-10), Fusion Engineering and Design,
**87**, 5-6, 657-661, DOI: 10.1016/j.fusengdes.2012.01.031 - T. J Tautges, R. Jain. (2012) “Creating geometry and mesh models for nuclear reactor core geometries using a lattice hierarchy-based approach”, Engineering with Computers,
**28**, 4, 319-329. - P. P. H. Wilson, T. J. Tautges, J. A. Kraftcheck, B. M. Smith, D. L. Henderson, (2010). “Acceleration techniques for the direct use of CAD-based geometry in fusion neutronics analysis”, Fusion Engineering and Design,
**85**, 10-12, 1759-1765, ISSN 0920-3796, DOI: 10.1016/j.fusengdes.2010.05.030. - Tautges, T. J. (2005). “CGM: a geometry interface for mesh generation, analysis and other applications”, Engineering with Computers,
**17**, 486–490. - T. J. Tautges, A. Caceres (2009). “Scalable parallel solution coupling for multiphysics reactor simulation”, Journal of Physics. Conference Series,
**180**, 012017, 2009.

## Refereed conference proceedings

- X. Zhao, R. Conley, N. Ray, V. S. Mahadevan, X. Jiao, “Conformal and Non-conformal Adaptive Mesh Refinement with Hierarchical Array-based Half-Facet Data Structures”, In proceedings of 24th International Meshing Roundtable (IMR24), Austin, TX, Oct 2015.
- N. Ray, I. Grindeanu, X. Zhao, V. S. Mahadevan, X. Jiao, “Array-Based Hierarchical Mesh Generation in Parallel”, In proceedings of 24th International Meshing Roundtable (IMR24), Austin, TX, Oct 2015.
- R. Jain, V. S. Mahadevan, “Simplying Workflow for Reactor Assembly and Full-Core Modeling”, In proceedings of Joint International Conference on Mathematics and Computation, Nashville, April 2015.
- V. S. Mahadevan, E. Merzari, I. Grindeanu, ”A glass box coupling methodology for rigorously solving strongly coupled phenomena in nuclear reactors”, Invited, In Proceedings of VI International Conference on Coupled Problems in Science and Engineering, San Servolo, Venice, Italy, May 2015.
- R. Jain, V. S. Mahadevan, ”Simplying Workflow for Reactor Assembly and Full-Core Modeling”, In Proceedings of Joint International Conference on Mathematics and Computation, Nashville, April 2015.
- Rajeev Jain, T.J. Tautges, “Generating Unstructured Nuclear Reactor Core Meshes in Parallel”, In Proceedings of 23rd International Meshing Roundtable, Oct 2014.
- Cao Lu, Xinglin Zhao, Navamita Ray, Xiangmin Jiao, “Generation of Hierarchical Tetrahedral Meshes with High-Order Projections for Efficient Multigrid Solvers”, In Proceedings of 23rd International Meshing Roundtable, Oct 2014.
- S. Cai, T.J. Tautges, “Surface Mesh Generation based on Imprinting of S-T Edge Patches”, In Proceedings of 23rd International Meshing Roundtable, Aug 2014.
- Rajeev Jain, T.J. Tautges, “NEAMS MeshKit: Nuclear Reactor Mesh Generation Solutions”, proceedings of International Congress on Advances in Nuclear Power Plants (ICAPP), Charlotte, North Carolina, Apr 2014.
- R. Jain, T. J. Tautges, “PostBL: Post-mesh Boundary Layer Mesh Generation Tool”, In Proceedings of the 22nd International Meshing Roundtable, Springer International Publishing, 331-348, 2014.
- V. Dyedov, N. Ray, D.Einstein, X. Jiao, T. Tautges, “AHF: Array-based half-facet data structure for mixed-dimensional and non-manifold meshes”, In Proceedings of 22nd International Meshing Roundtable, Orlando, Florida, October 2013.
- S. Mohanty, R. Jain, S. Majumdar, T. J. Tautges, M. Srinivasan, “Coupled Field-Structural Analysis of HTGR Fuel Brick Using Abaqus”, International Congress on the Advances in Nuclear Power Plants, June 2012.
- R. Jain and T. J. Tautges, “Parallel Reactor Geometry (and Mesh) Generator”, International Congress on the Advances in Nuclear Power Plants (ICAPP), Chicago, IL, June 24-28, 2012.
- T. J Tautges, Alvaro Caceras, Rajeev Jain, Hong Jun Kim, Jason Kraftcheck and Brandon M Smith, “Coupled Multi-Physics Simulation Frameworks for Reactor Simulation: A Bottom-Up Approach”, International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering, May 2011.

## Conference talks

- Vijay Mahadevan, Navamita Ray, Iulian Grindeanu, “FASTMath Unstructured Mesh (MOAB) Solver (PETSc) Interactions”, SIAM CS&E, Salt Lake City, March 2015.
- Navamita Ray, Xinglin Zhao, Vijay Mahadevan, Xiangmin Jiao, “Efficient Unstructured Mesh Traversal Methods Based on Array-Based Half Facets”, SIAM CS&E, Salt Lake City, March 2015.
- Xiangmin Jiao, Navamita Ray, Cao Lu, Xinglin Zhao, “High-Order Surface Reconstruction with Applications in Parallel Meshing and Finite Element Solvers”, SIAM CS&E, Salt Lake City, March 2015.
- Rajeev Jain, Jacob Becker, Vijay Mahadevan, Patrick Shriwise, Robert O’Bara, Iulian Grindeanu, “OCC-Based Meshing for RGG Applications Using MeshKit”, SIAM CS&E, Salt Lake City, March 2015.
- Forrest M. Hoffman, Pavel B. Bochev, Philip J. Cameron-Smith, Richard C. Easter, Jr., Scott M. Elliot, Steven J. Ghan, Iulian R. Grindeanu, Robert B. Lowrie, Donald D. Lucas, Vijay S. Mahadevan, Kara J. Peterson, Bill Sacks, Manishkumar B. Shrivastava, Mark A. Taylor,Mariana Vertenstein, Patrick H. Worley, “Applying Computationally Efficient Schemes for BioGeochemical Cycles (ACES4BGC)”, SciDAC-3 PI Meeting, July 2014.
- Iulian Grindeanu, Danqing Wu, Robert Jacob, “Parallel Infrastructure in MOAB for Climate Data”, 19th Annual CESM Workshop, Breckenridge, Colorado, June 2014.
- V. S. Mahadevan, E. Merzari, T. J. Tautges, “SHARP Coupled Multiphysics toolkit for reactor analysis”, invited talk, proceedings of International Congress on Advances in Nuclear Power Plants (ICAPP), Charlotte, North Carolina, Apr 2014.
- V. S. Mahadevan, T. J. Tautges, R. Jain, “Tools Supporting the Assembly of Multiphysics Simulation Codes from Standalone Parallel Physics Codes”, In Proceedings of SIAM Parallel Processing (SIAM PP14), Portland, Oregon, Feb 2014.
- Rajeev Jain, Timothy J. Tautges, Iulian Grindeanu, Chaman Verma, Shengyong Cai, and Scott A. Mitchell, “MeshKit: an open-source library for mesh generation and meshing algorithm research”, In Symposium on Trends in Unstructured Mesh Generation, 12th U.S. National Congress on Computational Mechanics, Raleigh, NC, July 2013.
- T. Tautges, V. S. Mahadevan, R. Jain, I. Grindeanu, “Interoperable Solution Transfer Tool for Coupled Multi-Physics Simulations”, In Proceedings of SIAM Conference on Computational Science and Engineering, February 25 – March 1, 2013, Boston, MA.
- R. Jain, T. J. Tautges, I. Grindeanu, C. Verma, S. Cai, S. A. Mitchell, “MeshKit: an open-source library for mesh generation and meshing algorithm research”, In Symposium on Trends in Unstructured Mesh Generation, 12th U.S. National Congress on Computational Mechanics, 2013. Raleigh, NC. 22nd July, 2013.

## Posters

- R. Jain, N. Ray, I. Grindeanu, D. Wu, V. S. Mahadevan, “Scalable Mesh Generation for HPC Applications”, Poster In Proceedings of 27th SuperComputing conference, Austin, TX, Nov 15-20, 2015.
- Vijay Mahadevan, Iulian Grindeanu, Rajeev Jain, Navamita Ray, Danqing Wu, Paul Wilson, “SIGMA: Scalable Interface for Geometry and Mesh Based Applications”, SIAM CS&E, CS&E Software mini-symposterium, Salt Lake City, March 2015.
- Iulian Grindeanu, Kara Peterson, Vijay Mahadevan, Navamita Ray, Rajeev Jain, “Scalable Advection Algorithms for Multi-Tracers in Climate Codes”, SIAM CS&E, Salt Lake City, March 2015.
- I. Grindeanu, K.E. Jansen, V. S. Mahadevan, B. Matthews, M. Rasquin, M.S. Shephard, “Unstructured Mesh-Solver interactions”, poster at SciDAC-3 PI meeting, Washington, DC, July 2014.
- Iulian Grindeanu, Kara Peterson, Timothy J. Tautges, Mark A. Taylor, Patrick H. Worley, “Intersection of Distributed Meshes for Multi-Tracer Transport Schemes”, poster at SciDAC-3 PI Meeting, July 2014.
- B. Ball, B. Bihari, K. Devine, L. Diachin, D. Ibanez, K.E. Jansen, J. Jiao, V. Leung, Q. Lu, V. S. Mahadevan, O. Sahni, E.S. Seol, M.S. Shephard, C.W. Smith, P. Wilson, “Unstructured Meshing Techniques”, poster at SciDAC-3 PI meeting, Washington, DC, July 2014.

## Technical Reports

- V. S. Mahadevan, “Coupled Physics Environment library – Design, implementation and release”, prepared for the U.S. Department of Energy, Office of Nuclear Energy, Milestone Technical Report, September 2014.
- E. Merzari, V. S. Mahadevan, I. Grindeanu, J. Solberg, R. Ferencz, R. Whitesides, “Preliminary Multiphysics Simulations with Online Mesh Deformation”, prepared for the U.S. Department of Energy, Office of Nuclear Energy, Milestone Technical Report, September 2014.
- R. Jain, V. S. Mahadevan, “MeshKit Release v1.2”, prepared for the U.S. Department of Energy, Office of Nuclear Energy, Milestone Technical Report, September 2014.
- Jain, Rajeev, Tautges, T. J., “MeshKit”, Report for US DOE, Reactor Campaign, ANL/MCS-TM-336, 2013.
- A. Bingham, J. Ortensi, R, Jain, I. Grindeanu, T. Tautges. “SHARP/PRONGHORN.” (2012). INL/EXT-12-27171. Idaho National Laboratory (INL), 2012.
- Tautges, T. J., Meyers, R., Merkley, K., Stimpson, C., and Ernst, C. (2004). MOAB: A mesh-oriented database, SAND2004-1592. Sandia National Laboratories, Albuquerque, NM.

## Workshops/Presentations

- I. Grindeanu, K.E. Jansen, V. S. Mahadevan, B. Matthews, M. Rasquin, M.S. Shephard, “Unstructured Mesh-Solver interactions”, poster at SciDAC-3 PI meeting, Washington, DC, July 2014.
- B. Ball, B. Bihari, K. Devine, L. Diachin, D. Ibanez, K.E. Jansen, X. Jiao, V. Leung, Q. Lu, V. S. Mahadevan, O. Sahni, E.S. Seol, M.S. Shephard, C.W. Smith, P. Wilson, “Unstructured Meshing Techniques”, poster at SciDAC-3 PI meeting, Washington, DC, July 2014.
- I. Grindeanu, K Peterson, TJ Tautges, MA Taylor, P. Worley, “Intersection of Distributed Meshes for Multi-Tracer Transport Schemes”, poster at SciDAC-3 PI meeting, Washington, DC, July 2014.
- T. J. Tautges, I. Grindeanu, “Mesh Intersection & Tracer Transport in MOAB”, ACES4BGC Meeting, Feb 2014.
- T. Peterka, T. Tautges, V. Vishwanath, J. Insley, V. Mahadevan, J. Woodring, “Cian Coupling Proxy App: Performance and Accuracy of CESAR Data Coupling”, CESAR Annual Review Meeting, Argonne National Laboratory, Dec 2013.
- Forrest M. Hoffman, Pavel B. Bochev, Philip J. Cameron-Smith, Richard C. Easter, Jr., Scott M. Elliott, Iulian Grindean, Oksana Guba, Xiaohong Liu, Robert B. Lowrie, Donald D. Lucas, Richard T. Mills, William J. Sacks, Timothy J. Tautges, Mark A. Taylor, Mariana Vertenstein, Patrick H. Worley, “Enhancing Global Biogeochemical Cycles in the Community Earth System Model”, Poster at SciDAC3 PI Meeting, July 2013.
- T. J. Tautges, V. S. Mahadevan, R. Jain, I. Grindeanu, “Software strategies in multi-physics coupling for reactor simulation and climate applications”, Workshop on Multiscale Modeling and Computing, Leiden, the Netherlands, April 2013.
- T. Tautges, V. S. Mahadevan, T. Peterka, “Mesh-based Data and Algorithms across the Simulation Process: anecdotes, activities, and opportunities”, UIUC-Argonne-Inria Joint Lab workshop, Argonne National Laboratory, Argonne, IL, Nov 2012.

## Tutorials

- ATPESC-2015 tutorial and repository.
- ATPESC-2014 tutorial and repository.
- ATPESC-2013 tutorial — Unstructured Mesh Handling for Extreme-Scale Computing.
- Rajeev Jain, “RGG Training” Nuclear Energy Division, Argonne National Lab, June 2014.
- Rajeev Jain, “RGG GUI Application Tutorial”, CASL, OakRidge National Lab, March 2014.
- ITAPS-MOAB – An introduction (Presentation)

## Citing SIGMA tools

**CGM**

`@article{tautges_cgm:2001,`

author = {Timothy J. Tautges},

title = {{CGM: A Geometry Interface for Mesh Generation, Analysis and Other Applications}},

journal = {Engineering With Computers},

volume = {17},

year = {2001},

pages = {299--314},

issue = {3},

doi = {10.1007/PL00013387},

masid = {732352}

}

**MOAB**

`@techreport{tautges_moab:2004,`

type = {{SAND2004-1592}},

title = {{MOAB:} A Mesh-Oriented Database},

institution = {Sandia National Laboratories},

author = {Tautges, T. J. and Meyers, R. and Merkley, K. and Stimpson, C. and Ernst, C.},

month = apr,

year = {2004},

note = {Report}

}

**Meshkit**

`@article{tautges_jain_meshkit:2012,`

year={2012},

issn={0177-0667},

journal={Engineering with Computers},

volume={28},

number={4},

doi={10.1007/s00366-011-0236-8},

title={Creating geometry and mesh models for nuclear reactor core geometries using a lattice hierarchy-based approach},

url={http://dx.doi.org/10.1007/s00366-011-0236-8},

publisher={Springer-Verlag},

keywords={Reactor core; Mesh generation; Lattice-based geometry},

author={Tautges, Timothy J. and Jain, Rajeev},

pages={319-329}

}