# 1. Overview

PMR is a Multiple Program Multiple Data (MPMD) participating media radiation solver for calculating radiative transport in conjunction with a separate fluid solver (commonly Sierra/Fuego). Its primary use is for fire simulations, where resolving radiative fluxes is of high importance.

Fig. 1.1 Example Fuego/PMR fire simulation with temperature (left) and scalar flux (right)

Documents containing results obtained through use of this software should cite

    @TECHREPORT{
      SAND2026-21620O,
      author = "Sierra Thermal Fluids Team",
      title = "SIERRA Multimechanics Module: PMR User Manual - Version 5.30",
      institution = "Sandia National Laboratories",
      year = "2026",
      type = "{SAND Report}",
      number = "2026-21620O",
      address = "Albuquerque, NM and Livermore, CA"
    }