Under all cases, the smoke temperature reaches the maximum directly above the fire source. The simulation results of vertical temperature distribution in an atrium can fit the modified McCaffrey plume model in any case. There then comes a situation where the stabile section of the fire ends in advance. When the smoke exhaust system is turned on, the thickness of the smoke layer and the smoke temperature decrease. The conditions of a higher heat release rate also show the characteristics of faster generation, faster spread and a larger volume of smoke. Furthermore, the average temperature of smoke in the atrium is also greater, up to about 400 ☌. The numerical simulation results show that under the conditions of higher heat release rate, the smoke spread rate is greater than that under the conditions of lower heat release rate. PyroSim fire simulation software is used to calculate this project, which is based on a full-scale experimental design scheme. This paper uses a numerical simulation method to conduct research. You will need to go back to your original model and make the same changes.In order to study the characteristics of fire smoke spread and temperature distribution of a large indoor pedestrian street under different heat release rates and smoke exhaust modes, this paper focuses on the analysis of fire smoke spread, visibility, smoke temperature distribution and variation curves in an atrium. See the attached images to understand what I did. If the mesh is large, then very small objects collapse to a point. Outlet vents were so small they were collapsing to a point (remember that FDS moves all geometry to the mesh coordinates. This is necessary because an end node can only have one duct attached. Added the inlet vent and connected the vent to an HVAC node, then made a new HVAC duct that connects the vent to the central distribution node.
Changed all HVAC ducts to reference the HVAC fan 3. You might want to consider multiple meshes and parallel processing Here are a list of changes to the model. To help understanding, I used Grouping to organize the model. Because the model is complex, I simplified it and deleted most of the geometry. However, there were several problems with this model that needed to be fixed, but the errors are understandable. First, an interesting model, so good work there.
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