An Experiment-Based Simplified Method for the Model of Building Groups in CFD Simulation
Table 10
The settings of various simulations in ANSYS Fluent.
Items
Contents
Simulation software
ANSYS fluent 16.1
Grid generation
Unstructured grid: the building grid size is 4 m, the ground grid size is 10 m, and the global grid size is 100 m; the size of the simplified building grid becomes 8 m, while other dimensions remain unchanged
Computational domain
The distances between the building outer boundary and the computational domain edge: ceiling = 5H, inflow boundary = 5H, cross-range = 5H, and outflow boundary = 15H; X ∗ Y ∗ Z: 2635 m ∗ 3815 m ∗ 468 m
Boundary condition
Inflow boundary and ceiling boundary: velocity-inlet——v = ∗ (Z/10)0.3 Outflow boundary: pressure-outlet——101325 Pa Lateral boundary: symmetry Ground and building surface: wall
Pressure
101325 Pa
Model
Standard k-ε model
Near wall treatment
Standard wall treatment
Solving algorithms
SIMPLEC
Convergence criteria
The speed of the monitoring point reaches a steady value
