FLIP (fluid-implicit-particle): A low-dissipation, particle-in-cell method for fluid flow

Conference · Thu Jan 01 00:00:00 EST 1987

OSTI ID:6173306

Brackbill, J U; Kothe, D B; Ruppel, H M

Since convective transport is the largest source of computational diffusion, FLIP (fluid-implicit-particle) eliminates convection, and uses instead a Lagrangian formulation. In FLIP, as in PIC, particles represent the fluid: a grid is used only to calculate interactions among particles. FLIP is an adaptation to fluid flows of the implicit moment method for plasma simulation. The particles carry coordinates, momentum, mass and energy; everything necessary to describe the fluid. Using the particle data, Lagrangian moment equations solved on a grid advance the particle variables from time step to time step. An adaptive grid and implicit time differencing extend the method to singular and low-speed flows. Aspects of FLIP's properties are illustrated by calculations of the Rayleigh-Taylor instability, an unstable, subsonic stream, and a supersonic jet. The results demonstrate FLIP's applicability to the many problems where low dissipation is crucial to correct modeling. 21 refs.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 6173306
• Report Number(s): LA-UR-87-2897; CONF-8704168-3; ON: DE87014745
• Resource Relation: Conference: Workshop on particle methods in fluid dynamics and plasma physics, Los Alamos, NM, USA, 13 Apr 1987; Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
FLUID FLOW
DISSIPATION FACTOR
ALGORITHMS
ENERGY TRANSPORT
FINITE DIFFERENCE METHOD
LAGRANGIAN FUNCTION
NAVIER-STOKES EQUATIONS
PLASMA SIMULATION
RAYLEIGH-TAYLOR INSTABILITY
DIFFERENTIAL EQUATIONS
EQUATIONS
FUNCTIONS
INSTABILITY
ITERATIVE METHODS
MATHEMATICAL LOGIC
NUMERICAL SOLUTION
PARTIAL DIFFERENTIAL EQUATIONS
SIMULATION
640410* - Fluid Physics- General Fluid Dynamics