CFD optimisation of a stadium roof geometry: a qualitative study to improve the wind microenvironment

Open Access

Table 2

Flow rate error for the three grid sizes.

Computational grid size	Q_flow rate (m³/s)	ε = (f₂ − f₁)/f₁ × 100%
Coarse: 122 709	−0.5394^*	5.4%
Middle: 237 703	−0.5115^*	–
Fine: 576 620	−0.5208^*	1.8%

The negative sign indicates that the flow exits the stadium interior from the ventilation opening.

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