Analysis of Dust Particle Movement in Room Environment

This study examines the transport and deposition patterns of dust particles entering a room through windows using ANSYS Fluent computational fluid dynamics (CFD) software.

Model Development

The three-dimensional model was created using Design Modeler software, representing a room configuration with two windows and a chimney. The computational mesh was generated in ANSYS Meshing with 42,061 elements. Given the time-dependent nature of particle movement, a transient solver approach was implemented.

Simulation Methodology

The analysis focused on dust particles entering the room at a velocity of 0.25 m/s, with particular emphasis on tracking their movement patterns and sedimentation behavior throughout the interior space. Key simulation parameters included:

• Discrete Phase Model (DPM) implementation to capture particle sedimentation
• Two-way coupling between particles and airflow to accurately represent particle-fluid interactions
• Laminar flow model for solving fluid equations

The boundary conditions established air entering through the two windows (inlets) and exiting via the chimney (pressure outlet), creating a realistic flow path through the room.

Results and Findings

The simulation produced two-dimensional visualization outputs including:

• Velocity contours
• Velocity vector fields
• Flow streamlines

These results demonstrated how airflow patterns directly influence dust particle transport within the room. Notably, areas with vortex formation showed greater potential for dust accumulation and sedimentation, as particles became trapped in recirculation zones rather than following the main flow path toward the chimney outlet.

The analysis provides valuable insights into indoor air quality dynamics and potential dust accumulation zones within residential spaces.