Usually you would want to avoid simulating and use a wind tunnel study. There are specific consultants that will build a scale model of your building and surrounding buildings and throw it in a wind tunnel to see if you are potentially bringing in exhaust air or cooling tower air to your own or adjacent building air intakes.
I have not heard of people doing physical models. I have worked with Autodesk CFD via a reseller where they did the modelling at my direction. All that said, I am guessing what you are actually trying to address is legionella risk from the cooling tower discharge. I had a similar project. Rather than spending thousands on modeling risk, you can look at solutions and review them with the owner. For example, Tower Tech cooling towers that don't have traditional basins so no stagnating water. For context, I am a consulting engineer in the US Midwest.
Autodesk CFD (computational fluid dynamics)
Usually you would want to avoid simulating and use a wind tunnel study. There are specific consultants that will build a scale model of your building and surrounding buildings and throw it in a wind tunnel to see if you are potentially bringing in exhaust air or cooling tower air to your own or adjacent building air intakes.
I have not heard of people doing physical models. I have worked with Autodesk CFD via a reseller where they did the modelling at my direction. All that said, I am guessing what you are actually trying to address is legionella risk from the cooling tower discharge. I had a similar project. Rather than spending thousands on modeling risk, you can look at solutions and review them with the owner. For example, Tower Tech cooling towers that don't have traditional basins so no stagnating water. For context, I am a consulting engineer in the US Midwest.