Therefore the CFD can only be used to illustrate what could possibly happen, and to get an idea of the stratefication. Can you get the CFD calculations to take this factor into account when using CFD? I haven't heard of this before.Īlso the CFD results are only a predicted airflow and are extremely sensitive to input parameters, and the flow is more or less steady state. Some of the external conditions i absorbed by the floors and walls. With regards to importing the boundary conditions from the dynamic (thermal) simulation, how do you take building mass into account. Subject: RE: Links between CFD or MZ and thermal simulations for simulating air and temperature distributions in atria It's easy to take several days for one CFD model to finish from my experience. The calculation time can be much longer if you have many objects in the model. If you create the model correctly and the computation converges, the stratification is quite stable.Ībout the radiation, you need to choose the appropriate model. You may try these two products.Īs for the stratification, it's not very sensitive to your input. Actually Trace just released this feature about a month ago since it produced unexpected result.

If you want to do energy modeling for the building for a year and you want to include stratification effect, I know E+ and Trace have DV feature. The industry don't even calculate a year load to size the equipement, why do you need to? Unless you want to do energy analysis for the building for the whole year, you are not supposed to do that. It takes forever for the calculation to finish. If you want to do CFD simulation for a year, it's almost impossible. IMO, you don't need to do dynamic simulation.

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Links between CFD or MZ and thermal simulations for simulating air and temperature distributions in atria Ding Li dingli at

Links between CFD or MZ and thermal simulations for simulating air and temperature distributions in atria

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