Isum 2017
March 5 - 9  2018
HOTEL HYATT REGENCY
Mérida, Yucatán, México
9th International Supercomputing Conference In Mexico
Creating an Insightful World through Supercomputing

 

 
 
 
 
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Temática 5: The SPH consistency problem and some astrophysical applications

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Ponente:
Jaime Klapp
 
Resumen
We discuss the SPH kernel and particle consistency problem and demonstrate that SPH has a limiting second-order convergence rate.   We also present a solution to the SPH consistency problem.  We present examples of how SPH implementations that are not mathematically consistent may lead to erroneous results.   The new formalism has been implemented into the Gadget 2 code, including an improved scheme for the artificial viscosity.   We present results for the “Standard Isothermal Test Case” of gravitational collapse and fragmentation of protostellar molecular cores that produce a very different evolution than with the standard SPH theory.  A further application of accretion onto a black hole is presented.