[b.simpson]

Hi CFD Experts,

I am quite new to OpenFOAM. I am trying to run a simple natural ventilation simulation of a simple box model building. I am running buoyantBoussinesqSimpleFoam on OpenFOAM V1812.

I am wanting to calculate average values of certain fields for specific areas of the model. For example, I am simulating CO2 and I want to get an averaged CO2 concentration within a pre-defined area inside my building and I also want to calculate the total CO2 concentration entering and leaving my building through the two window openings.

I am not sure how this is suppose to be accomplished in OpenFOAM. My current attempt involves using topoSet to generate cellZoneSets which I then want to use the fieldAverage on from the controlDict.

I have two main questions regarding this task:

1. Is this approach, that I am trying to get working, the correct/best method for calculating these sorts of averages?

2. I am currently getting a fatal error when I run buoyantBoussinesqSimpleFoam saying that Entry 'Type' not found in dictionary "IOstream.zone1". Providing that the answer to question 1 is that this is the best method, what 'Type' should I use in the constant/fvOptions file?

I have looked through the available 'Type' choices but I am unsure which one, if any, are correct for this situation.

For information I have attached screen shots of my error message, controlDict, topoSetDict and fvOptions.

Any support on this issue would be much appreciated.

Regards,
Ben