ASC Weekly News Notes

Womble, David E.¹ 

[1]Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

DOI  :  10.2172/1257613
RP-ID  :  SAND2016-4898R
PID  :  OSTI ID: 1257613
Others  :  Other: 640694

美国|英语

来源: SciTech Connect

【 摘 要 】

Unified collision operator demonstrated for both radiation transport and PIC-DSMC. A side-by-side comparison between the DSMC method and the radiation transport method was conducted for photon attenuation in the atmosphere over 2 kilometers in physical distance with a reduction of photon density of six orders of magnitude. Both DSMC and traditional radiation transport agreed with theory to two digits. This indicates that PIC-DSMC operators can be unified with the radiation transport collision operators into a single code base and that physics kernels can remain unique to the actual collision pairs. This simulation example provides an initial validation of the unified collision theory approach that will later be implemented into EMPIRE.