Numerical study of transport and deposition of particles in a 2-D turbulent channel flow using V2F turbulence model

A computational model for simulating the instantaneous velocities in a 2-D turbulent channel flow by an anisotropic turbulence model was developed. The effect of anisotropic turbulence intensity on the transport and deposition of particles in the channel was studied. The V2F turbulence model has been used for evaluating the mean flow field and the anisotropic turbulence intensities. The Kraichnan method for generating continuous Guassian random field was extended and used for simulating the anisotropic velocity fluctuations in the channel flow. The Lagrangian particle tracking approach was used for analyzing the particle movements. The Stokes drag, lift, Brownian and gravity forces were included in the particle equation of motion. The Brownian force was simulated using a white noise stochastic process model. Effects of turbulence fluctuations on the deposition rate of different size particles were studied. Comparison of the results with the previous experimental and numerical results shows the capability of the developed model. Effect of gravity on particle deposition was also investigated and it was shown that the gravity force in the streamwise direction increases the deposition rate of large particles.

کلیدواژه ها:

Turbulence ، V2F Model ، Particle Deposition ، Channel flow