Trapper: Discrete Phase Flow Trap by Gravity

Description

Particle trapping in gravity-driven flow systems is a core problem in mechanical engineering, particularly in the design of separation and filtration equipment used across environmental control, industrial processing, and particulate management applications. This CFD simulation uses ANSYS Fluent's Discrete Phase Model (DPM) to analyze particle-fluid interactions within a trapping system, focusing on how particle trajectories, separation, and capture are governed by gravity-driven flow and turbulent dispersion effects.

Methodology

The Discrete Phase Model is configured to represent particle behavior through defined injection methods, size distributions, and material properties, while the continuous fluid phase is modeled with appropriate body force terms and pressure gradients to capture gravity-driven flow. Two-way coupling between particles and fluid is implemented to account for mutual momentum and energy transfer, and turbulence models are applied alongside DPM to capture turbulent dispersion effects on particle trajectories. Boundary conditions are configured for both phases, including inlet flow conditions, particle injection parameters, and outlet conditions, with convergence managed through tailored under-relaxation factors, particle-tracking time-step sizing, and residual monitoring appropriate for coupled particle-fluid simulations.

Results Analysis

Post-processing examines particle trajectories, trapping efficiency, fluid flow patterns, and particle concentration distributions using detailed visualization techniques suited to discrete phase simulations. The results characterize how particles are separated and captured within the gravity-driven system, offering insight into particle trapping mechanisms relevant to the design and optimization of separation systems used in air and water purification, industrial filtration, and particulate control technologies.