pyrosim学习笔记.doc

参数描述备注Heat Release Rate（热释放率）The heat release rate per unit area of this burner.Mass Loss RateThe mass loss rate per unit area of this burner.Ramp-Up Time（增加，上升时间）At the beginning of the simulation, this surface will not beburning. This field allows you to describe how the heat releaseramps up from ambient to the specified value.（暂时不明白）Extinguishing Coefficient（熄灭系数）This parameter governs the suppression of the fire by water.（喷淋系统）Surface TemperatureThe surface temperature of this burner.Convective Heat Flux（对流热通量）The heat flux per unit area at the surfaceEmissivityThis parameter controls how the surface radiates heat. Usinga value of 1.0 makes this surface a black body. Lower valuesincreate the amount of radiated heat.参数描述备注Emit ParticlesEnable this option to emit particles from the surface.Particle TypeSelect a particle to emit.Number of Particles per CellControls the number of particles inserted per second. A valueof 1 will insert one particle per cell per second.Mass FluxFor particles that have mass, this option provides an alternate水Layered(分层)Layered surfaces are composed of one or more material definitions. Materials include solid andliquid substances such as concrete（混泥土）, pine（松木）, and ethanol（乙醇）.BackingThe backing of a surface is the boundary condition behindthe surface. The default value, Air Gap represents an air gap, Exposed will allow the surface to transfer heat into the space behind the wall, and Insulated prevents any heat loss from the back of the material.Material CompositionWithin a layer (row), you can specify multiple materials based on mass fraction. For example, to specify a layer that is just brick, type 1.0 BRICK (assuming you have created amaterial called BRICK). To specify a layer of wet brick, you could enter 0.95 BRICK; 0.05 WATER. Each material is separated by a semi-colon.Porous（能穿透）The property is generally used to create a fan using a thin obstruction.Enable LeakageThis option allows you to select two pressure zones for leakage across the surface.Air LeakAir leak surfaces can be used to create a permeable barrier between two pressure zones. The porous option is available to allow air movement to occur across this obstructions using this surface.Adding Textures to SurfacesYou can add textures to surfaces to increase the realism of your model. Some default textures are provided or you can import your own. The Room Fire example demonstrates using a wood texture for a pine floor and hanging a picture on a wall. Your textures will be automatically displayed in PryoSim; to display textures in Smokeview, select Textures on the Show/Hide menu.To define a texture:1. On the Model menu, click Edit Surfaces.2. Either create or edit the surface to which you want to add a texture.3. Click on the Texture box.4. Either select a pre-defined texture or click the Import. button and select your own image file.5. The image you selected will be displayed. Under the image, click the Details tab. Set theWidth and the Height values to correspond to size to be used in the PyroSim model.Obstruction PropertiesSmoothPrevents vorticity（漩涡） from being generated at the corners. This option is used to prevent flow problems along angled walls due to the stair-stepped（楼梯）, rectilinear geometry used by FDS.Record BNDFWhen this option is selected, this object is included in boundary data output.Chapter 14. Activation EventsActivation events使用状况：1. 模拟门在某个时间打开；2. 模拟窗在某个时间打开；3. 模拟通风系统在某个时间开启；Chapter 15. Output ControlsSolid Profiles测量固体的温度和密度。这固体表面必须定义为有热传导的，如果表面不是热传导的，则此定义的将会在模拟开始前输出个错误消息并退出。Slices测量气体某一个平面的温度，速度，压力。Slice files may be viewed in Smokeview by selecting Load/Unload-Slice file.Boundary Quantities测量每个阻碍物的温度。To view boundary data in Smokeview (e.g. wall temperature), right-click to open the menu, then select: Load/Unload-Boundary File-WALL_TEMPERATURE.Isosurfaces（等值面）描绘三维的气象工程量。To view isosurface data in Smokeview, right-click to open the menu, then select: Load/Unload-Isosurface File-TEMPERATURE。Plot3D Data可以显示二维的速度，热量释放率，温度等。StatisticsChapter 4. MeshesWorking with meshes要求建模的每个物体都必须再网格内，最好的计算是物体边界贴近网格。如果有超出网格的物体，虽然不会出现任何警告，但是在烟气模拟中不会出现超出