Related Experiment Video
Updated: Jul 12, 2025

A Microfluidic-based Hydrodynamic Trap for Single Particles
Published on: January 21, 2011
Variable-moment fluid closures with Hamiltonian structure
1Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA. jburby@lanl.gov.
Abstract:
Based on ideas due to Scovel-Weinstein, I present a general framework for constructing fluid moment closures of the Vlasov-Poisson system that exactly preserve that system's Hamiltonian structure. Notably, the technique applies in any space dimension and produces closures involving arbitrarily-large finite collections of moments. After selecting a desired collection of moments, the Poisson bracket for the closure is uniquely determined. Therefore data-driven fluid closures can be constructed by adjusting the closure Hamiltonian for compatibility with kinetic simulations.
Related Concept Videos
Dimensionless Groups in Fluid Mechanics
The Fluid Mosaic Model
Fluid Mosaic Model
Newtonian Fluid: Problem Solving
A velocity gradient forms within the fluid when a Newtonian fluid is placed between two parallel plates, with...
Fluid Movement Between Compartments
Principle of Moments
The moment is calculated by multiplying the magnitude of the force by the perpendicular distance from the point of application to the point about...

