Revised moment propagation method for scalar transport. Academic Article

abstract

• The moment propagation (MP) method was used to study the transport of a passive scalar by a turbulent fluid. Numerical results show that the MP method does not accurately capture the evolution of a scalar field at moderate Reynolds numbers. A theoretical analysis proves that the diffusivity derived from the MP model depends on fluid velocity, which limits the range of Pclet number. We describe an improved MP model (MP2) which eliminates the velocity-dependent diffusion, leading to more accurate predictions of scalar transport in high-velocity flows; at low velocities both methods give similar results. We test the model for a variety of simple flows and find that accurate results can be obtained at grid Pclet numbers in excess of 10.

authors

• Girimaji, Sharath

published proceedings

• Phys Rev E Stat Nonlin Soft Matter Phys

author list (cited authors)

• Yu, D., Girimaji, S. S., & Ladd, A.

citation count

• 6

complete list of authors

• Yu, D||Girimaji, SS||Ladd, AJC

publication date

• November 2008

publisher

• American Physical Society (APS)  Publisher

published in

• Physical Review E: Statistical, Nonlinear, and Soft Matter Physics  Journal

keywords

• 0915 Interdisciplinary Engineering

PubMed Central ID

• 19113236

Digital Object Identifier (DOI)

• 10.1103/PhysRevE.78.056706

start page

• 056706

volume

• 78

issue

• 5 Pt 2