CIG Activities in Mantle Convection 2008 SSC Meeting

CIG Activities in Mantle Convection 2008 SSC Meeting CIG Business Meeting December 11, 2007

Available Packages • Citcom. S Latest release version 3. 0. 2 in March, 2008 (downloads of 52). • Citcom. CU Latest release version 1. 0. 2 in May, 2007 (downloads of 69). • HC code (analytic model). CIG Business Meeting December 11, 2007 2

Citcom. S [(in)compressible, thermochemical convection, standard geophysical outputs (geoid, topography, stress, …)] CIG Business Meeting December 11, 2007 3

Available Packages • Citcom. S Latest release version 3. 0. 2 in March, 2008 (downloads of 52). • Citcom. CU Latest release version 1. 0. 2 in May, 2007 (downloads of 69). • HC code (analytic model). CIG Business Meeting December 11, 2007 4

Citcom. CU (incompressible) CIG Business Meeting December 11, 2007 5

Available Packages • Citcom. S Latest release version 3. 0. 2 in March, 2008 (downloads of 52). • Citcom. CU Latest release version 1. 0. 2 in May, 2007 (downloads of 69). • HC code (analytic model). CIG Business Meeting December 11, 2007 6

Workshops & Community-Driven Development in the last year • Release of Citcom. S 3. 0. 1 in 11/07 and 3. 0. 2 in 3/08 • Key features (a talk by Tan, Leng, Zhong and Gurnis at this meeting): • • • Compressibility. All the previously available features including thermochemical convection, calculations of the geoid and stress, non-Newtonian rheology, . . . Continuous development of the 1 -D code (HC) led by Becker, Steinberger and others. Thermodynamics code by Lithgow-Bertelloni and Stixrude. Benchmarks for incompressible Citcom. S (Zhong et al. [2008, in review]) and for 2 -D compressible mantle convection (by the groups of King, van Keken, Tan, Moresi, and Zhong). CIG Business Meeting December 11, 2007 7

Parallel efficiency for Citcom. S 32^3 elements/core, 21 time steps, accuracy=1 e-2, constant viscosity, multigrid # of cores Total time (sec) p-iterations v-iter 12 (1 x 1 x 1) 69. 80 112 118 24 (1 x 1 x 2) 64. 13 95 103 48 (2 x 2 x 1) 53. 65 73 78 96 (2 x 2 x 2) 53. 93 74 79 192 (4 x 4 x 1) 47. 22 55 63 384 (4 x 4 x 2) 46. 84 55 58 768 (4 x 4 x 4) 52. 36 58 61 1536 (8 x 8 x 2) 58. 21 60 70 3072 (8 x 8 x 8) 59. 05 54 57 CIG Business Meeting December 11, 2007 8

Workshops & Community-Driven Development in the last year, continued • Training session at the Earthscope workshop at Monterey, CA, in Mar. 2007. • Well represented at the workshop on adaptive mesh refinement in Boulder, Colorado in Oct. 2007. • Look forward to 2008 Davis workshop in July. CIG Business Meeting December 11, 2007 9

Current CIG Work • • • Collaborate with Omar Ghattas’ group at UT Austin on developing a scalable adaptive mesh mantle convection code. Maintain, speed up and scale up for existing CIG convection codes, but no major new development planned for these codes. Release of compressible Citcom. CU in 2008 (Leng & Zhong). A 2 -D code at CIG (Citcom or/and Con. Man). Continue on 1 -D codes (Becker), 2 D compressible convection benchmark (King et al. ), and thermodynamics code (Lithgow-Bertelloni & Stixrude). CIG Business Meeting December 11, 2007 10

Rhea: 3 D parallel AMR CIG Business Meeting December 11, 2007 11

Parallel Efficiency for Rhea CIG Business Meeting December 11, 2007 12

Current CIG Work • • • Collaborate with Omar Ghattas’ group at UT Austin on developing a scalable adaptive mesh mantle convection code. Maintain, speed up and scale up for existing CIG convection codes, but no major new development planned for these codes. Release of compressible Citcom. CU in 2008 (Leng & Zhong). A 2 -D code at CIG (Citcom or/and Con. Man). Continue on 1 -D codes (Becker), 2 D compressible convection benchmark (King et al. ), and thermodynamics code (Lithgow-Bertelloni & Stixrude). CIG Business Meeting December 11, 2007 13

Long Term Plans • Mantle convection with adaptive meshing refinement (identified at 2005 Boulder workshop). To work with Wolfgang Bangerth at UT A&M on deal. II and Omar Ghattas at UT Austin on scalable AMR codes. CIG Business Meeting December 11, 2007 14