Numerical modeling of particle motion and deposition in turbulent wavy channel ows

Abstract

This work investigates the turbulent How and particles deposition in wavy duct Hows. The v2f turbulence model was used for simulating the turbulent How through the wavy channel. The instantaneous turbulence fluctuating velocities were simulated using the Kraichnan Gaussian random field model. For tracking particles in the fluid flow, the particle equation of motion was solved numerically. The drag, Saffman lift, Brownian, and gravity forces acting on a suspended particle were included in the particle equation of motion. The effects of duct wave amplitude and wavelength on deposition of particles of different sizes were studied. A range of waves with different amplitudes and wavelengths was simulated. The particle tracking approach was validated for turbulent How in a flat horizontal channel, where good agreement with previous studies was found. The presented results showed that the duct wavy walls significantly increased the particle deposition rate.