1. Scalable Algorithms and Coupled Physics Group, Computational Sciences and Engineering Division, Oak Ridge National Laboratory , 1 Bethel Valley Rd ., TN 37831 , USA .
2. Department of Mathematics, Colorado State University , Fort Collins , CO 80523-1874 , USA .
3. Department of Geosciences, Colorado State University , Fort Collins , CO 80523 , USA .
4. SISSA, International School for Advanced Studies , Via Bonomea 265, 34136 , Trieste , Italy .
5. Department of Geological Sciences, University of Florida , 1843 Stadium Road , Gainesville , FL, 32611 , USA .
6. School of Mathematical and Statistical Sciences, Clemson University , Clemson , SC, 29634 , USA .
7. Department of Information Technology, Uppsala University , Box 337, 751 05 Uppsala , Sweden .
8. Institute of Mathematics, University of Augsburg , Universitätsstr. 12a, 86159 Augsburg , Germany .
9. Department of Mathematics, Texas A&M University , 3368 TAMU , College Station , TX 77845 , USA .
10. Institute of Material Systems Modeling, Helmholtz-Zentrum Hereon , Max-Planck-Str. 1, 21502 Geesthacht , Germany .
11. Independent researcher . Geesthacht , Germany
12. Department of Mathematics and Mathematical Statistics, Umeå University , SE-90187 Umeå , Sweden .
13. Department of Mathematics, University of North Carolina , Chapel Hill , NC 27516 , USA .