Research Activities

Computational electromagnetic code development and testing

List of Projects

Underwater electromagnetic field modeling for naval applications (funded continuously by ONR since 2004); faculty = John Young & Robert Adams

Large-scale electromagnetic modeling for integrated circuit applications (continuously funded by ANSYS since 2016); faculty = Robert Adams, Caicheng Lu & John Young

Large scale electromagnetic modeling for space-based applications (funded by NASA in the past, future funding expected); faculty = Adams, Lu & Young

Computational Methods

We use our own source code, developed in C++ & Fortran (Intel compilers and libraries)

Software

Intel C++ & Fortran compilers & libraries

Faculty

John Young & Caicheng Lu

Students and postdocs

Chee Kean Chang, Grad, ECE
Buxton Johnson, Grad, ECE
Owen Tanner Wilkerson, Grad, ECE

Removed:
Jin Cheng, postdoc
Nastaran Hendijani, PhD student, ECE
Jun-shik Choi, PhD student, ECE

Grants:

Agency: Office of Naval Research, Title: "Efficient Large-Scale Magneto-Stress Analysis of Complex Structures", John Young (PI), Robert Adams (CO-PI)
Robert Adams (PI), John Young (CO-PI)
Agency: ANSYS, Title: Fast Solution of Method of Moments Linear Systems for Signal Integrity Application
Agency: NASA, Title: "Fast computational electromagnetic methods for GEMINI", Robert Adams (PI), John Young (CO-PI)
NNX13AB12A NASA EPSCoR: Efficient linear solution libraries for Gemini National Aeronautics and Space Administration 3/1/2014 - 2/28/2015
N00014-11-1-0625 Large Scale Topside Electromagnetic Modeling Office of Naval Research 5/16/2011 - 12/31/2014 $678,413

Efficient Linear Solvers for Gemini

The purpose of this project is to integrate the sparse linear solution library, MFDlib, developed at the University of Kentucky, with NASA’s primary computational electromagnetics tool, Gemini. MFDlib is a library of data sparse methods for efficient filling, factorization, and solution of large electromagnetic problems formulated using integral equation methods. The integration of MFDlib with Gemini will enable NASA to solve large-scale problems that are currently beyond the capacity of NASA’s existing tools and facilities.

Computational Methods

Method of moments, local-global solution methods, adaptive cross approximation, mimetic discretizations.

Software

Gemini is a Fortran code developed by NASA’s Johson Space Center. All other software is developed by the UKY team. The dlx software relies on the Intel Fortran compilers, the Intel MKL library, and the Intel MPI libraries.

Faculty

Robert J. Adams (PI)
John C. Young (co-PI)

Grants

NNX13AB12A NASA EPSCoR: Efficient linear solution libraries for Gemini National Aeronautics and Space Administration 3/1/2014 - 2/28/2015

Publications relying on DLX

Journal papers

2016 - 2019

J.C. Young, D. Boyd, S.D. Gedney, T. Suzuki, and J. Liu, "A DGFETD Port Formulation for Photoconductive Antenna Analysis," IEEE Antennas and Wireless Propagation Letters, vol. 14, pp. 386-389, Feb. 2015. doi: 10.1109/LAWP.2014.2364524
J.C. Young, R.J. Adams, and S.D. Gedney, "Well-Conditioned Nyström-Discretization of the Volume Integral Equation for Eddy Current Analysis," IEEE Trans. Magnetics., vol. 51, p. 700406, Feb. 2015. doi: 10.1109/TMAG.2014.2355780
J.C. Young, R.J. Adams, S.D. Gedney, Carl Schneider, and Chris Burgy, "A Stepped Non-Linear Solver for Non-Linear Magnetic Materials with Hysteresis," IEEE Trans. Magnetics, vol. 51, no. 6, June 2015, Art. ID 7301106. doi: 10.1109/TMAG.2014.2376993
N. Hendijani, J. Cheng, R. J. Adams, J. C. Young, "Constrained Locally Corrected Nystrom Method," IEEE Trans. Antennas Propagat., vol. 63, no. 7, pp. 3111-3121, July 2015. doi: 10.1109/TAP.2015.2429732
J. Cheng, R. J. Adams, J. C. Young, M. A. Khayat, "Augmented EFIE with Normally Constrained Magnetic Field and Static Charge Extraction," IEEE Trans. Antennas Propagat., vol. 63, no. 11, pp. 4952-4963, November 2015. doi: 10.1109/TAP.2015.2478936
R. Pfeiffer, J.C. Young, and R.J. Adams, "Numerical Characterization of Divergence-Conforming Constrained Basis Functions for Surface Integral Equations," IEEE Trans. Antennas Propagat., , vol. 65, no. 4, pp. 1867-1874, April 2017. doi: 10.1109/TAP.2017.2669965
R.J. Adams and J.C. Young, "Diagonal Factorization of Integral Equation Matrices Via Localizing Sources and Orthogonally Matched Receivers," Progress in Electromagnetics Research M, vol 56., pp. 1-10, April 2017. doi: 10.2528/PIERM16121201
J.C. Young and R.J. Adams, "High-Order Divergence-Conforming Constrained Bases for Triangular Cells," IEEE Trans. Antennas Propagat., vol. 65, no. 9, pp. 4717-4727, Sept. 2017. doi: 10.1109/TAP.2017.2722826
R. Pfeiffer, J.C. Young, and R.J. Adams, "Divergence-Conforming Constrained Basis Functions for Hexahedral Volume Elements," IEEE Trans. Antennas Propagat., vol. 66, no. 1, pp. 501-504, Jan. 2018. doi: 10.1109/TAP.2017.2775288
J.C. Young, R. Pfeiffer, R. J. Adams, and S. D. Gedney, "Locally Corrected Nystrom Discretization for Impressed Current Cathodic Protection Systems," Applied Electromagnetics Society Journal, vol. 33, no. 10, pp. 1081-1085, October, 2018. LINK
R. A. Pfeiffer, J. C. Young, R. J. Adams, and S. D. Gedney, "Higher-order simulation of impressed current cathodic protection systems," Journal of Computational Physics, vol. 394, pp. 522-531, October 2019. doi: 10.1016/j.jcp.2019.06.008

Magazine:

J. C. Young, "Higher-Order Mesh Generation Using Linear Meshes [EM Programmer's Notebook]," in IEEE Antennas and Propagation Magazine, vol. 61, no. 2, pp. 120-126, April 2019. doi: 10.1109/MAP.2019.2895599

2015

J. Cheng, R.J. Adams, J.C. Young, M.A. Khayat, “Augmented electric field integral equation with normally constrained magnetic field and static charge extraction,” IEEE Transactions on Antennas and Propagation, 63(11), 2015.
N. Hendijani, J. Cheng, R.J. Adams, J.C. Young, “Constrained locally corrected Nyström method,” IEEE Transactions on Antennas and Propagation, 63(7), 2015.
J.C. Young, S.D. Gedney, R.J. Adams, C. Schneider, C. Burgy, “A Stepped Non-Linear Solver for Non-Linear Magnetic Materials with Hysteresis,” IEEE Transactions on Magnetics, 51(6), 2015.
J.C. Young, R.J. Adams, S.D. Gedney, “Well-Conditioned Nyström-discretization of the volume integral equation for eddy current analysis,” IEEE Transactions on Magnetics, 51(2), 2015.

2014

J. Cheng, R.J. Adams, J.C. Young, “Augmented electric field integral equation with normally constrained magnetic field,” IEEE Transactions on Antennas and Propagation, in review.
J.C. Young, R.J. Adams, S.D. Gedney, “Well-Conditioned Nyström-discretization of the volume integral equation for eddy current analysis,” IEEE Transactions on Magnetics, in review.
J.C. Young, S.D. Gedney, R.J. Adams, “A stepped non-linear solver for non-linear magnetic materials with hysteresis,” IEEE Transactions on Magnetics, in review.

2013

N. Hendijani, J. Cheng, R.J. Adams, “Combined field integral equation using a constraint-based Helmholtz decomposition,” IEEE Transactions on Antennas and Propagation, 62(3):1500-1503, 2013.
J.C. Young, S. D. Gedney, R.J. Adams, “Eddy current analysis using a Nyström discretization of the volume integral equation,” IEEE Transactions on Magnetics, 99(1):1-7, 2013.
J. Cheng, R.J. Adams, “Electric field-based surface integral constraints for Helmholtz decompositions of the current on a conductor,” IEEE Transactions on Antennas and Propagation, 61(9):4632-4640, 2013.
R.J. Adams, X. Xu, C. Luo, B. A. Davis, “A near interaction preconditioner for MLFMA using overlapped localizing modes,” Microwave and Optical Technology Letters, 55(1):156-160, 2013.

2012

J.C. Young, Y. Xu, R.J. Adams, S.D. Gedney, “High-order Nyström discretization of an augmented electric field integral equation,” IEEE Antenna and Wireless Propagation Letters, vol. 11, pp. 846-849, 2012.
X. Xu, R.J. Adams, “Sparse matrix factorization using overlapped localizing LOGOS modes on a shifted grid,” IEEE Transactions on Antennas and Propagation, 60(3):1414-1424, 2012.

Conference proceedings

N. Hendijani, R.J. Adams and J.C. Young, “High-order Nyström implementation of an augmented volume integral equation” IEEE AP-S International Symposium aequation using a constraint-based Helmholtz decomposition,” IEEE Transactions on Antennas and Propagation, 62(3):1500-1503, 2013.
J.C. Young, S. D. Gedney, R.J. Adams, “Eddy current analysis using a Nyström discretization of the volume integral equation,” IEEE Transactions on Magnetics, 99(1):1-7, 2013.
J. Cheng, R.J. Adams, “Electric field-based surface integral constraints for Helmholtz decompositions of the current on a conductor,” IEEE Transactions on Antennas and Propagation, 61(9):4632-4640, 2013.
R.J. Adams, X. Xu, C. Luo, B. A. Davis, “A near interaction preconditioner for MLFMA using overlapped localizing modes,” Microwave and Optical Technology Letters, 55(1):156-160, 2013.
J.C. Young, Y. Xu, R.J. Adams, S.D. Gedney, “High-order Nyström discretization of an augmented electric field integral equation,” IEEE Antenna and Wireless Propagation Letters, vol. 11, pp. 846-849, 2012.
X. Xu, R.J. Adams, “Sparse matrix factorization using overlapped localizing LOGOS modes on a shifted grid,” IEEE Transactions on Antennas and Propagation, 60(3):1414-1424, 2012.

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