Airflow velocity along building facades instead of pressure coefficient

Hi, does anyone know how to present the simulated result of airflow velocity along building surfaces (facades & roofs) ? i see the Eddy3D templates offer two kinds of simulated results including pressure coefficient along building surfaces and airflow velocity (vector) on a certain plane (horizontal/vertical), but no example shows how to present the variation of airflow velocity along each building surface.
And what’s the relationship between pressure and pressure coefficient, i see most of CFD software allow to present pressure result rather than pressure coefficient, and Edd3D goes for pressure coefficient.
Many thanks.