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intro:modelconcept [2019/05/31 13:15] – [Software Versions] enviadmin | intro:modelconcept [2021/07/28 00:36] – enviadmin | ||
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===== Overview in a Nutshell===== | ===== Overview in a Nutshell===== | ||
- | ENVI-met | + | ENVI-met is a holistic three-dimensional non-hydrostatic model for the simulation of surface-plant-air interactions not only limited to, but very often used to simulate urban environments and to asses the effects of green architecture visions. |
- | It is designed for microscale with a typical horizontal resolution from 0.5 to 10 m and a typical time frame of 24 to 48 hours with a time step of 1 to 5 seconds. This resolution allows to analyze small-scale interactions between individual buildings, surfaces and plants. | + | It is designed for microscale with a typical horizontal resolution from 0.5 to 10 m and a typical time frame of 24 to 48 hours with a time step of 1 to 5 seconds. This resolution allows to analyze small-scale interactions between individual buildings, surfaces and plants. Depending on computer resources and time, you can also use ENVI-met to simulate complete months or even a whole year. |
The model calculation includes: | The model calculation includes: | ||
- | * Shortwave and longwave radiation fluxes with respect to shading, reflection and re-radiation from building systems and the vegetation | + | * Shortwave and longwave radiation fluxes with respect to shading, reflection and re-radiation from building systems and the vegetation. ENVI-met provides high-resolution modelling of all radiative fluxes, including multiple reflections in urban areas and radiation diffusion in tree canopies. |
* Transpiration, | * Transpiration, | ||
* Dynamic surface temperature and wall temperature calculation for each facade and roof element supporting up to 3 layers of materials and 7 calculation points in the wall/ roof. | * Dynamic surface temperature and wall temperature calculation for each facade and roof element supporting up to 3 layers of materials and 7 calculation points in the wall/ roof. | ||
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===== Software Versions ===== | ===== Software Versions ===== | ||
- | The **LITE** version of ENVI-met | + | The **LITE** version of ENVI-met is free and comes along as a complete model including the basic simulation core for non-commercial applications, |
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**Radiative fluxes** | **Radiative fluxes** | ||
- | ENVI-met contains newly developed analysis modules to model the fluxes of shortwave and longwave radiation inside of complex environments. The scheme takes into account shading by complex geometries, reflections by different surface and building materials and the effect of vegetation on all radiative fluxes. The Expert Version introduces | + | ENVI-met contains newly developed analysis modules to model the fluxes of shortwave and longwave radiation inside of complex environments. The scheme takes into account shading by complex geometries, reflections by different surface and building materials and the effect of vegetation on all radiative fluxes. The full versions of ENVI-met include |
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** Pollutant dispersion ** | ** Pollutant dispersion ** | ||
- | The pollutant dispersion model of ENVI-met allows the synchronous release, dispersion and deposition of up to 6 different pollutants including particles, passive gases and reactive gases. Sedimentation and deposition at surfaces and vegetation is taken into account as well as the photochemical reaction between NO, NO< | + | The pollutant dispersion model of ENVI-met allows the synchronous release, dispersion and deposition of up to 6 different pollutants including particles, passive gases and reactive gases. Sedimentation and deposition at surfaces and vegetation is taken into account as well as the photochemical reaction between NO, NO< |
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** Soil water content ** | ** Soil water content ** | ||
- | Simulating the water balance of the surface and the soil is a crucial aspect in urban microclimatology. While humid soils can act as cooling devices, dry soils are often hotter than asphalt. In addition, the cooling effect, and -on a longer time perspective- the vitality of vegetation depends on available soil water. ENVI-met dynamically solves the soil hydraulic state of the soil based on [[wp> | + | Simulating the water balance of the surface and the soil is a crucial aspect in urban microclimatology. While humid soils can act as cooling devices, dry soils are often hotter than asphalt. In addition, the cooling effect, and -on a longer time perspective- the vitality of vegetation depends on available soil water. ENVI-met dynamically solves the soil hydraulic state of the soil based on [[wp> |
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**Vegetation health assessment/ TreePass/ Wind Risk Assessment** | **Vegetation health assessment/ TreePass/ Wind Risk Assessment** | ||
- | The impact of vegetation on the microclimate is only one side of the story. To grow and live, plants also need adequate local climate conditions fitting to their individual demand profile. Too much or too little sun, to heavy wind loads on the trees or stagnating air: Many aspects of the microclimate can interfere with the plants requirements and hinder a healthy and robust growth. Using our TreePass technology, the local growing conditions and the plants profiles can be matched to provide an optimal placement. Our wind risk assessment simulates the tree mechanics in order to assess the risk of wind and storm damage depending on the crown structure and the tree location. (Consulting only). | + | The impact of vegetation on the microclimate is only one side of the story. To grow and live, plants also need adequate local climate conditions fitting to their individual demand profile. Too much or too little sun, to heavy wind loads on the trees or stagnating air: Many aspects of the microclimate can interfere with the plants requirements and hinder a healthy and robust growth. Using our TreePass technology, the local growing conditions and the plants profiles can be matched to provide an optimal placement. Our wind risk assessment simulates the tree mechanics in order to assess the risk of wind and storm damage depending on the crown structure and the tree location. (TreePass Module to-come). |
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