Accession Number:

AD1038169

Title:

Thermal, Microchannel, and Immersed Boundary Extension Validation for the Lattice-Boltzmann Method: Report 2 in Discrete Nano Scale Mechanics and Simulations Series

Descriptive Note:

Technical Report

Corporate Author:

ERDC Vicksburg United States

Personal Author(s):

• England,William P.
• Allen,Jeffrey B.

Report Date:

2017-07-01

Pagination or Media Count:

48.0

Abstract:

The Lattice Boltzmann Method continues to garner interest in fluids research, particularly with its ability to accurately simulate laminar flows in the incompressible region. This interest can be attributed in part to the ease of implementation the Lattice Boltzmann Method provides including a lack of complex differential terms and a linear approximation of the collision operator contained in the Boltzmann equation. In this work, the traditional Lattice Boltzmann solver is augmented with support for immersed boundaries, thermal flows, and microchannel flows. Thermal and micro-enabling support is demonstrated and validated through Rayleigh convection in a square channel and thermally coupled Poiseuille flow through a microchannel, respectively.

Descriptors:

• fluid dynamics
• LAMINAR FLOW
• kinetic theory
• heat transmission
• computational fluid dynamics
• fluid flow
• pressure distribution
• knudsen number
• mean free path
• distribution functions
• momentum
• poiseuille flow
• coefficients
• relaxation time
• algorithms
• NAVIER STOKES EQUATIONS

Subject Categories:

• Numerical Mathematics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE