PetClaw swMATH ID: 6807 Software Authors: Amal Alghamdi; Aron Ahmadia; David I. Ketcheson; Matthew G. Knepley; Kyle T. Mandli; Lisandro Dalcin Description: PetClaw: a scalable parallel nonlinear wave propagation solver for Python. We present PetClaw, a scalable distributed-memory solver for time-dependent nonlinear wave propagation. PetClaw unifies two well-known scientific computing packages, Clawpack and PETSc, using Python interfaces into both. We rely on Clawpack to provide the infrastructure and kernels for time-dependent nonlinear wave propagation. Similarly, we rely on PETSc to manage distributed data arrays and the communication between them. We describe both the implementation and performance of PetClaw as well as our challenges and accomplishments in scaling a Python-based code to tens of thousands of cores on the BlueGene/P architecture. The capabilities of PetClaw are demonstrated through application to a novel problem involving elastic waves in a heterogeneous medium. Very finely resolved simulations are used to demonstrate the suppression of shock formation in this system. Homepage: https://dl.acm.org/citation.cfm?id=2048590 Programming Languages: Python Keywords: parallel; Clawpack Related Software: PyWENO; SharpClaw; Pyclaw Referenced in: 1 Publication Referenced by 1 Author 1 Lemoine, Grady I. Referenced in 1 Serial 1 SIAM Journal on Scientific Computing Referenced in 3 Fields 1 Numerical analysis (65-XX) 1 Mechanics of deformable solids (74-XX) 1 Geophysics (86-XX) Referencing Publications by Year