Lorena A. Barba group


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Reproducible and replicable CFD: it's harder than you think

Choosing an incorrect boundary condition with IBAMR resulted in spurious blockage of vortices at the outlet. Thanks to the support received in the code users' forum, this and other problems were resolved and we succeeded in replicating previous findings.

Reproducible and replicable CFD: it's harder than you think. Submitted: 13 May 2016. Preprint arXiv:1605.04339 Accepted: 13 Oct. 2016, Computing in Science and Engineering. Overview We do our best to accomplish reproducible research and have for years worked to improve our practices to achieve this goal. Barba made a pledge in 2012, the “Reproducibility PI Manifesto,” according... Continue »

Barba group student news

group-photo

Barba group students have been awarded fantastic opportunities this year! Tingyu Wang was selected to participate in the International High-Performance Computing Summer School in Slovenia (June 26 to July 1). This will be the seventh instance of this international summer school, a collaboration of the National Science Foundation XSEDE program, the European PRACE program, Calcul Canada and... Continue »

Pi-Yueh Chuang at GTC 2016

piyueh-with-jensen

At this year's NVIDIA GPU Technology Conference, PhD student Pi-Yueh Chuang presented the work "Using AmgX to Accelerate PETSc Codes." AmgX is an NVIDIA library that provides sparse linear solvers, smoothers and preconditioners on GPU devices. Pi-Yueh presented his work to couple AmgX with our fluid-flow solver, PetIBM. This code solves the Navier-Stokes equations on Cartesian... Continue »

Submitted: Inexact Krylov iterations and relaxation strategies with fast-multipole boundary element method

sketch of quadrature-points clustering on boundary element method

Submitted: 19 June 2015   This paper presents a method to algorithmically accelerate boundary element methods. The fast multipole method (FMM) is already used in this context to obtain O(N) computational complexity while solving a dense linear system. Using relaxed-accuracy matrix-vector multiplications in a Krylov solver, we can achieve speed-ups in the order of 4x... Continue »

Probing protein orientation near charged surfaces

Figure from our paper on probing protein orientation near charged surfaces.

First version submitted: 31 March 2015. Submission of split papers: June 7 & June 12. Accepted: 4 Sept. & 26 Dec. 2015.   UPDATE: The material in the original manuscript was split in two papers, submitted to different peer-reviewed journals. The editorial decision on the first submission was that the paper was out of scope... Continue »

Ph.inally D.one!

Congratulations Anush! Friends surprised Anush with this lovely cake to celebrate his accomplishment.

Two Barba-group Ph.D. students successfully defended their doctoral dissertation this week. Congratulations to them! Anush Krishnan came to Boston University on 2009, after completing a Dual Degree (B. Tech & M. Tech.) in Aerospace Engineering at IIT Madras, Chennai, India. He has worked on development of immersed boundary methods (IBM) for solving Navier-Stokes equations at moderate... Continue »