BibTex format
@inproceedings{Schlander:2022,
author = {Schlander, RK and Papadakis, G and Rigopoulos, S},
title = {RESOLVENT ANALYSIS OF TURBULENT PIPE FLOW LADEN WITH LOW INERTIA PARTICLES},
year = {2022}
}
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Citation
RIS format (EndNote, RefMan)
TY - CPAPER
AB - We extend the resolvent framework to turbulent flows laden with low inertia particles. The particle velocities are modelled using the equilibrium Eulerian model, which is valid for Stokes numbers up to 1. We analyse a vertical turbulent pipe flow with a Reynolds number of 5300 based on diameter and bulk velocity, for Froude numbers Fr = 0.4,-0.4 and Stokes numbers St+ = 0-1. A direct numerical simulation (DNS) for a pipe with a length of 7.5 diameters (D) is performed with the particles released uniformly at the pipe inlet. The resolvent formulation can predict some of the physical phenomena observed in inertial particle flows such as localized high concentration due to the vortical centrifuge effect, turbophoresis and gravitational effects. It is shown that the upward flow increases particle concentration in the log layer of the pipe. The downward flow increases concentration near the centre of the pipe: both features have been observed in previous Lagrangian simulations as well as experiments. The main effect of Stokes number is the amplification of smaller streamwise wavelengths, therefore, increasing local scale clustering of particles. The effect of the direction of gravity was also reproduced using a simplified resolvent model which did not require a mean concentration profile as input and simplifies the analysis since no prior simulation or experiment is required for the model to work.
AU - Schlander,RK
AU - Papadakis,G
AU - Rigopoulos,S
PY - 2022///
TI - RESOLVENT ANALYSIS OF TURBULENT PIPE FLOW LADEN WITH LOW INERTIA PARTICLES
ER -