Description This project uses ANSYS Fluent to simulate wind flow around three buildings arranged in a triangular configuration, treating the buildings as flow barriers. A horizontal wind of 5 m/s enters the surrounding domain and interacts with the structures. The goal is to examine how the flow evolves around and between the buildings. Methodology The 3D geometry is created in DesignModeler. Meshing is performed in ANSYS Meshing with an unstructured grid totaling 6,392,910 elements; cells near the building surfaces are locally refined for higher accuracy. Conclusion Post-processing provides velocity and pressure contours, velocity vectors, and 2D pathlines. Results show peak wind speed at the building tips (windward edges), followed by separation and vortex formation in the wakes. Behind the middle building, the separated flow forms a symmetric, coupled vortex pair that combines into a larger wake structure than those behind the other two buildings. Pressure contours indicate the highest pressure on the windward face of the middle building.

Atmospheric Wind Flow Analysis Around Villa Complex: ANSYS Fluent CFD Tutorial This comprehensive CFD study examines external atmospheric wind interaction with a residential villa complex using ANSYS Fluent computational software. The villa configuration includes multiple residential structures with integrated courtyard spaces surrounded by an atmospheric flow domain. The simulation analyzes wind patterns at 3 m/s velocity under standard atmospheric pressure conditions. The wind approaches the villa at an oblique angle, requiring velocity decomposition into orthogonal coordinate components for accurate boundary condition specification. The incoming wind maintains a 20-degree inclination relative to the y-axis, producing velocity components of 2.817 m/s in the positive y-direction (3×cos(20°)) and 1.026 m/s in the negative x-direction (3×sin(20°)). The computational setup illustrates the problem configuration with Cartesian coordinate reference and wind vector orientation. Villa Complex Modeling and Grid Generation The three-dimensional computational domain was developed using Design Modeler software, encompassing the villa complex within a rectangular atmospheric flow region. The villa features multiple buildings connected by courtyard areas. The computational domain utilizes a cuboidal flow region with two lateral surfaces designated as velocity inlets aligned with the wind angle, while opposite surfaces serve as pressure outlets for flow discharge. Grid generation was accomplished using ANSYS Meshing software with an unstructured mesh approach containing 1,825,278 computational elements. Enhanced mesh refinement near building surfaces ensures accurate boundary layer resolution and improved flow prediction around architectural features. Computational Fluid Dynamics Implementation The numerical simulation incorporates the following modeling framework: Simulation Parameters: Pressure-based solver implementation Isothermal flow analysis (thermal effects excluded) Steady-state flow conditions Gravitational effects neglected Turbulence Modeling: Standard k-epsilon turbulence model Standard wall function treatment for near-wall regions Boundary Configuration: Inlet boundaries: Velocity specification with decomposed wind components x-velocity: -1.026 m/s y-velocity: 2.817 m/s z-velocity: 0 m/s Outlet boundaries: Atmospheric pressure conditions (0 Pascal gauge) Building surfaces: No-slip wall boundaries Numerical Methods: SIMPLE pressure-velocity coupling algorithm Second-order spatial discretization for all transport equations Standard initialization matching inlet flow conditions Villa Wind Flow Simulation Results Upon computational convergence, comprehensive flow visualization is generated including two-dimensional and three-dimensional pressure and velocity contour distributions, supplemented by detailed velocity vector field representations. Cross-sectional analysis encompasses XY, YZ, and XZ planes to provide complete characterization of the three-dimensional wind flow patterns around the villa complex.

Description This project uses ANSYS Fluent to simulate wind flow through a domain containing three buildings that act as flow barriers—representative of common “flow-around-obstacle” problems (e.g., buildings, wings, propellers, rigs). A horizontal airstream of 5 m/s enters the domain and interacts with the buildings to examine wake development and vortex behavior. Wind Methodology The analysis is transient over 1 s with a 0.01 s time step, solved with a pressure-based approach. The 3D geometry (DesignModeler) is a large rectangular region of 120 m × 300 m × 100 m containing three buildings, each 75 m tall. Meshing (ANSYS Meshing) is unstructured with 128,893 elements, with local refinement near building surfaces for accuracy. Wind Conclusion Results include pressure and velocity contours, turbulent kinetic energy (TKE), pathlines, and velocity vectors. The highest pressure occurs on the windward faces where the flow first impinges. Vortices form in the leeward wakes of the buildings. All reported fields are evaluated at the final simulation time (t = 1 s).

Description This project models internal airflow in a building atrium using ANSYS Fluent. Atriums—rooted in Roman architecture and now often multi-story with glazed roofs—provide daylight and ventilation for interior spaces. In this case, a cylindrical central atrium admits air at 2 m/s and 101,325 Pa through a lower inlet, with exhaust through an upper outlet. Methodology The 3D geometry of the complex and its cylindrical atrium is built in SpaceClaim. Meshing is performed in ANSYS Meshing with an unstructured grid of ~2,500,000 elements, locally refined near interior boundaries to better capture gradients. Conclusion The simulation examines pressure and velocity distributions and overall airflow behavior within the atrium. Outputs include 2D/3D contours of pressure and velocity, plus pathlines and velocity vectors, enabling identification of zones with favorable comfort conditions.

Description This project simulates airflow and natural ventilation in an octagonal windcatcher using ANSYS Fluent. Windcatchers are tall rooftop towers that capture ambient wind to flush out warm, polluted indoor air and drive fresh air into the building. Their internal walls and channels trap and guide the flow downward from upper intake panels into the occupied space below. The windcatcher sits in a large open-domain environment with a horizontal wind of 10 m/s at atmospheric pressure. The geometry is created in ANSYS DesignModeler and meshed in ANSYS Meshing with an unstructured grid of 2,332,185 cells. Method This is a fluid-only analysis (no heat transfer). The internal layout above the windcatcher includes barrier surfaces so that some upper inlets face the wind directly while others are shielded. This arrangement establishes a pressure differential: windward openings promote inflow/traction, while leeward sides promote suction, driving circulation through the windcatcher shaft and the room beneath. Results Post-processing provides velocity and pressure contours, plus velocity vectors and pathlines. The windward side of the windcatcher shows higher pressure than the leeward side. Flow visualizations confirm that air enters via the top panels, is guided and trapped by interior walls, then descends and discharges through lower panels into the interior—indicating the windcatcher operates as intended.

Description This study models conjugate heat transfer (CHT) in a simplified 4-story wind tower using ANSYS Fluent. The 2D geometry is built in DesignModeler, and a structured mesh of 6,375 elements is generated in ANSYS Meshing. Wind Tower Methodology CHT (combined conduction + convection) is solved within the tower. The diagonal wall on the right side is heated to 305 K and includes volumetric heat generation of 1000 W/m³. Incoming air enters at the top-left inlet with velocity = 12 m/s and temperature = 300 K, then distributes through all four levels for ventilation and cooling. Natural-convection effects are included by enabling gravity in the Y direction and using the Boussinesq approximation for air density (ρ₀ = 1.225 kg/m³, β = 0.00331 1/K). The flow ultimately exits via a pressure outlet at the top-right of the tower. Conclusion Post-processing yields 2D velocity, pressure, and temperature contours, plus streamlines and velocity vectors. Temperature plots show heating from the diagonal wall and resulting thermal distributions. Flow visualizations indicate that upper levels receive higher-momentum inflow (lower hydraulic resistance), while lower levels exhibit recirculating/rotational cells driven by the forced inflow. As warm air rises along the hot wall, buoyancy carries it upward to the top-right outlet, completing the ventilation cycle.

Description This project simulates airflow inside a building’s double-skin façade (DSF) using ANSYS Fluent. In a DSF, solar heating warms the cavity air, which then rises by buoyancy, contributing to passive heating and ventilation. The 3D geometry (DesignModeler) is a 0.6 × 3.2 × 5 m rectangular cavity with two parts: a duct section for airflow and a glazed section that absorbs solar gains. Openings include a 0.2 m inlet at the bottom of the glass wall and a 0.2 m outlet near the top. Meshing (ANSYS Meshing) produces 490,725 elements. Facade Methodology The study evaluates buoyancy-driven motion of warmed air inside the DSF. The glass region is assigned a uniform volumetric heat generation of 6940 W/m³ to represent solar input. Building walls are brick with convective exchange to the interior at T = 300 K and h = 23 W/m²·K (free convection). Supply air enters the façade at 304.55 K and atmospheric pressure. Buoyancy is captured by modeling air density via the ideal gas law and applying gravity = 9.81 m/s². Conclusion Post-processing yields 2D/3D pressure, velocity, and temperature contours plus velocity vectors. The vectors show an upward flow within the cavity, confirming buoyancy-driven ventilation in the double-skin façade.

Description This project uses ANSYS Fluent to study how dust particles enter a room through windows and move/deposit inside. The 3D geometry (DesignModeler) represents a room with two windows and a chimney. Meshing (ANSYS Meshing) yields 42,061 elements. Because deposition evolves over time, the simulation is transient. Dust Particles Methodology Dust-laden air enters via the two window inlets at 0.25 m/s and exits through a pressure outlet at the chimney top. Particle transport and settling are modeled with a two-way coupled Discrete Phase Model (DPM) to capture interaction between the particles and the carrier flow. The laminar flow model is used for the continuous phase. Conclusion Outputs include 2D velocity contours, vectors, and streamlines, revealing airflow paths and dust motion. The wind-driven flow carries particles along the main stream, while recirculation zones promote enhanced deposition and sediment accumulation.