Akshay Sridhar
Research Webpage
Current: Research Scientist, Environmental Science and Engineering, Caltech (CliMA)
PhD 2018. (Advisor: Prof. Dale Pullin), GALCIT, Caltech, Stanback STEM Fellow (2018)
M.S. Space Engineering, Caltech (2014), Pickering Fellowship (2013-14)
B.E.(Honours) Mechanical Engineering, University of Canterbury NZ (2013)
Research Interests
Computational fluid dynamics (CFD)
Earth-system modelling; data-assimilation and subgrid-scale modelling of atmospheric processes
Large-eddy simulations (LES) of rough and smooth wall turbulent boundary layers (incompressible, high Re flow)
High performance computing, large scale data analysis
System identification, structural response and structure-soil interactions during earthquakes
Publications
Akshay Sridhar, Yassine Tissaoui, Simone Marras, Zhaoyi Shen, Charles Kawczynski, Simon Byrne, Kiran Pamnany, Maciej Waruszewski, Thomas H Gibson, Jeremy E Kozdon, Valentin Churavy, Lucas C Wilcox, Francis X Giraldo, Tapio Schneider (2022) Large-eddy simulations with ClimateMachine v0.2.0: a new open-source code for atmospheric simulations on GPUs and CPUs, Geoscientific Model Development, 15, 6259-6284 . [Link]
Z Shen, A Sridhar, Z Tan, A Jaruga, T Schneider (2021) A Library of Large-eddy Simulations for Calibrating Cloud Parameterizations. (JAMES) [Link]
Sridhar, A. & Pullin, D. I. (2018) LES of turbulent boundary layer flows with smooth-rough and rough-smooth wall boundary transitions (In preparation for PRF)
Sridhar, A., Pullin, D. I., & Cheng, W. (2017). Rough-wall turbulent boundary layers with constant skin friction. Journal of Fluid Mechanics, 818, 26-45. [Link]
Kuang, A., Sridhar, A., Garven, J., Gutschmidt, S., Rodgers, G. W., Chase, J. G., ... & MacRae, G. A. (2015). Christchurch Women’s Hospital: Performance Analysis of the Base-Isolation System during the Series of Canterbury Earthquakes 2011–2012. Journal of Performance of Constructed Facilities, 30(4), 04015096. [Link]
Sridhar, A., Kuang, A., Garven, J., Gutschmidt, S., Chase, J. G., Gavin, H. P., ... & MacRae, G. A. (2014). Christchurch Women's Hospital: Analysis of Measured Earthquake Data during the 2011–2012 Christchurch Earthquakes. Earthquake spectra, 30(1), 383-400. [Link]
Gavin, H, Sridhar, A, Rodgers, GW, MacRae, GA, Chase, JG, Coar, M, Harvey, P, Nigbor, R, Farrel, R and Gutschmidt, S (2013). "Seismically-Isolated Christchurch Women's Hospital (NZ) Aftershock Monitoring 2011-09-14 - 2012-06-25", Network for Earthquake Engineering Simulation, (data=463 files), doi: 10.4231/D3901ZF92. [Curated Dataset]
Conference Presentations/ Papers / Posters
Zhaoyi Shen, Akshay Sridhar, Zhihong Tan, Anna Jaruga and Tapio Schneider. A library of large-eddy simulations for calibrating cloud parameterizations (AGU 2021) [Link]
Ben Mackay, Lenka Novak, Christopher N Hill, Simon Byrne, Valeria Barra, Oswald Knoth, Katherine Deck, Akshay Sridhar, Gregory LeClaire Wagner, Michael Howland and Tapio Schneider. Coupling Different Hierarchies of Climate Models with the CliMA Coupler (AGU 2021) [Link]
A. Sridhar, Z. Shen, Y. Tissaoui, S Marras, L Wilcox, J.E. Kozdon, M. Waruszewski, T. H. Gibson, C. Kawczynski, K. Pamnany, S. Byrne, F. X. Giraldo, T. Schneider. Study of Turbulence Closures in Atmospheric Flows with Discontinuous-Galerkin Numerics in ClimateMachine.jl (SIAM GS21)
Y. Tissaoui, A. Sridhar, Y. Cohen, S. Guimond, C. Kawczynski, A. Jaruga, S. Byrne, L. Wilcox, J. Kozdon, F. X. Giraldo, S. Marras, T. Schneider. Impact of nonlinear effects and asymmetric dynamics on tropical cyclone intensification. (34th Conference on Hurricanes and Tropical Meteorology)
A. Sridhar, Y. Tissaoui, Z. Shen, S Marras, C. Kawczynski, M. Waruszewski, T. H. Gibson, J. E. Kozdon, V. Churavy, L. Wilcox , F. X. Giraldo, T. Schneider. GCM-Driven-LES in a Julia-GPU Framework. (SIAM CSE21)
Sridhar, A., Pullin, D. I. Large-eddy simulation of turbulent boundary-layer flow through a rough-smooth wall-surface transition. In APS Meeting Abstracts. (APS DFD 2017). [Link]
Sridhar, A., Pullin, D. I., & Cheng, W. Modeling and large-eddy simulation (LES) of a turbulent boundary layer over linearly-varying surface roughness. In APS Meeting Abstracts. (APS DFD 2016). [Link]
Various topics: GALCIT Fluid Mechanics Research Conference (Department Seminars,2016,2017,2018)
Sridhar A., McVicar J. and Gutschmidt S. Group dynamics of a building cluster: A nonlinear model. Seoul, South Korea: International Conference on Geomechanics and Engineering (ICGE 2012) (Presented by Gutschmidt, S). [Link]
Teaching
The Ernest E. Sechler Memorial Award in Aeronautics, 2018 (Teaching and Research contributions, BASE11/AMP program)
BASE11/ Caltech Aerospace Mentorship Program (Jan-Jun 2018), Lead Mentor
AE101 (2015-18): Fluid Mechanics, 7 terms (Teaching Assistant)
AE232 (2017): Computational Fluid Dynamics, 1 term (Teaching Assistant)
Project mentor, John Muir High School (Spring 2017)
Extra-Curricular
Invited panelist (academic support), Whitney Workshop for Summer Undergraduate Research Fellows (2018)
Caltech International Offices Orientation Leader (Summer 2014-2018)
Graduate Student Council: Orientation panelist (academic support), 2015
Catalina Community Associate (Caltech Graduate Housing volunteer team, 2013-2016)
Student Volunteer Army member, post-earthquake manual labour and support (2010,2011)
University of Canterbury Hockey Club Funding Officer (2009-2012)