TY - JOUR
T1 - A Formulation for Fully Resolved Simulation (FRS) of Particle-Turbulence Interactions in Two-Phase Flows
AU - Apte , S. V.
AU - Patankar , N. A.
JO - International Journal of Numerical Analysis and Modeling
VL - 5
SP - 1
EP - 16
PY - 2018
DA - 2018/11
SN - 5
DO - http://doi.org/
UR - https://global-sci.org/intro/article_detail/ijnam/836.html
KW - DNS, particle-turbulence interactions, point-particle, fully resolved particles.
AB - <p style="text-align: justify;">A numerical formulation for fully resolved simulations of
freely moving rigid particles in turbulent flows is presented. This work
builds upon the fictitious-domain based approach for fast computation of
fluid-rigid particle motion by Sharma &amp; Patankar ([1] Ref. J. Compt.
Phys., (205), 2005). The approach avoids explicit calculation of
distributed Lagrange multipliers to impose rigid body motion and reduces
the computational overhead due to the particle-phase. Implementation of
the numerical algorithm in co-located, finite-volume-based, energy
conserving fractional-step schemes on structured, Cartesian grids is
presented. The numerical approach is first validated for flow over a
fixed sphere at various Reynolds numbers and flow generated by a freely
falling sphere under gravity. Grid and time-step convergence studies are
performed to evaluate the accuracy of the approach. Finally, simulation
of 125 cubical particles in a decaying isotropic turbulent flow is
performed to study the feasibility of simulations of turbulent flows in
the presence of freely moving, arbitrary-shaped rigid particles.</p>