Dynamics of radiating fluids

Conference · Fri Jan 01 00:00:00 EST 1982

OSTI ID:5226920

Mihalas, D; Weaver, R

The purpose of this paper is to give an overview of the role of radiation in the transport of energy and momentum in a combined matter-radiation fluid. The transport equation for a moving radiating fluid is presented in both a fully Eulerian and a fully Lagrangian formulation, along with conservation equations describing the dynamics of the fluid. Special attention is paid to the problem of deriving equations that are mutually consistent in each frame, and between frames, to 0(v/c). A detailed analysis is made to show that in situations of broad interest, terms that are formally of 0(v/c) actually dominate the solution, demonstrating that it is essential (1) to pay scrupulous attention to the question of the frame dependence in formulating the equations, and (2) to solve the equations to 0(v/c) in quite general circumstances. These points are illustrated in the context of the nonequilibrium radiation diffusion limit, and a sketch of how the Lagrangian equations are to be solved is presented.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 5226920
• Report Number(s): LA-UR-82-743; CONF-820429-1; ON: DE82012132; TRN: 82-014422
• Resource Relation: Conference: Los Alamos/CEA conference, Paris, France, 19 Apr 1982
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
HYDRODYNAMICS
PHOTON EMISSION
RADIATIONS
RADIATION TRANSPORT
FLUID FLOW
FLUIDS
LAGRANGE EQUATIONS
LORENTZ TRANSFORMATIONS
DIFFERENTIAL EQUATIONS
EMISSION
EQUATIONS
FLUID MECHANICS
MECHANICS
PARTIAL DIFFERENTIAL EQUATIONS
TRANSFORMATIONS
654001* - Radiation & Shielding Physics- Radiation Physics
Shielding Calculations & Experiments
640420 - Fluid Physics- Properties & Structure of Fluids- (-1987)