ENVI_MET for large domains and fast computing (MBR)
With Version 4.3 (Winter 1718) a new chapter of ENVI_MET modelling will be opened with three new features that go hand-in-hand and will allow a fast an flexible computing of large areas.
64 Bit Support: ENVI_MET switches the main model and main application to 64 Bit. This allows to make full usage of the computer memory and is a necessary condition to compute large areas
Free-Sized Model Domains: Starting with V4.3 there are no longer predefined maximum model sizes such as 150×150 or 250×250. The memory is allocated dynamically to fit the selected model area size and is only limited by the computer resources available.
Parallel Computing: To allow larger model areas and also to speed up the calculation process in general, many routines of ENVI_MET are now parallelized to support multiple CPU cores. As parallel computing on standard computers is a relatively new field, we will continue to improve and extend the parallel routines in upcoming versions of ENVI_MET.
Using ENVI_MET for large-scale WUDAPT simulations (TKR)
Since ENVI_MET V4.3 is now able to be run in 64-bit mode and with all processors used in parallel, the model areas used can be sized quite large. (The right computer presumed) It is now possible to simulate city quarters in the range of kilometers in a reasonable resolution and time.
The Local Climate Zone Classification of WUDAPT (www.wudapt.org) ) is about to be used as input data for these big model areas. The Local Climate Zones defined by Steward and Oke (2012) classify urban areas and their rural surrounding into 17 types like Compact High-Rise in CBDs, Heavy Industry or Dense Trees (forests). WUDAPT is an open project in which everybody can participate by classifying a city into Local Climate Zones. The satellite-based classification which covers big parts of city can now be used to provide large model areas for ENVI_MET. A small interface generating those model areas using the WUDAPT data as input is developed in the course of a master thesis at the moment. The output of these big ENVI_MET simulations may then consecutively be used as nesting input for further high resolution runs with ENVI_MET (self-nesting)
Connecting with the larger world: Nesting ENVI_MET in the WRF mesoscale model (TKR)
Currently a development of a coupling between the mesoscale Weather and Research Forecast Model (WRF) and ENVI_MET is in progress. This new downscaling method will allow ENVI_MET simulations to be driven by meteorological output data of WRF real data cases.
By completing this task a link will be established connecting climatic processes on the mesoscale and microscale level. High range processes influenced by mountains, lakes or forests will provide the input data for high resolution simulations with ENVI_MET. WRF seems to be the perfect driver for this, representing itself as state-of-the-art model with more than 20,000 users worldwide simulating weather forecasts as well as research projects.
15th May 2017
Regarding the energy balance of the interior of a building, our new editor MONDE assigns every building a number, which allows the adaption of the material properties for the whole building. A more detailed digitalization of the project area is possible from now on. Additionally, this enables a more accurate simulation of the air temperature in the inside, which depends on the orientation and the properties of the fa?ades and the available volume of air, due to enclosed adjacent buildings.
1st February 2017
ENVI_MET Monde: The vector-based future of model editing (MBR)
Designing an ENVI_MET model area using the SPACES editor often consumes a large amount of time, especially for huge areas or if different resolutions should be used.
With the option of simulating very large areas from ENVI_MET V4.3, editing the Area Input Files by hand has become not only time consuming but practically impossible. Therefor we are developing a new vector based editor, “ENVI_MET Monde” since two years. The editor support the CAD-like drawing of buildings, vegetation and all other elements of the ENVI_MET Area Input files. In addition, you can import existing data from ESRI Shapefiles, access and import OpenStreet Map data or CAD files.
For the new app, you can easily generate ENVI_MET model areas in any resolution by the mouse click.
More information on ENVI_MET will be available soon.
30th October 2016
ENVI_MET meets Minecraft: Making building model areas collaborative and fun! (HSI)
The game world of the popular game Minecraft has many similarities to our microclimate model ENVI_MET: In both cases the worlds consist out of discrete three-dimensional blocks or, more technical voxels. In both, the game as well as in our microclimate simulation, these blocks can only consist out of a single material (air, building, vegetation, etc.). Minecraft, of course, does not store any physical properties such as volumetric heat capacity or albedo, but the multitude of different Minecraft block types together with a user defined lookup table that defines which Minecraft block type corresponds to an ENVI_MET database item make it possible to convert Minecraft worlds to ENVI_MET model areas. This way you can build your model areas together with your friends while playing Minecraft. Also, there is already a multitude of Minecraft replicas of cities that can be used to import to ENVI_MET.
5th June 2016
We are happy and proud to introduce a new PhD Thesis written by Helge Simon from our lab that has just be defended.
This thesis describes a number of new features introduced in ENVI-met including a wide set of numerical testing and in-situ validations.
The main features included are:
The new 3D plant-as-object model allowing a very realistic simulation of the plants transpiration behaviour
Introduction of a BVOC chemical model allowing to simulate the emission of biogen gases by plants and their impact on the NO-NO2-Ozone reactions (only in the Xpert Version of ENVI-met so far) Evaluation of the new multi-node wall model including validation studies
Coupling of ENVI-met with MUKLIMO_3 of the German Wather Service DWD (continuation of work) The thesis can be found here:https://publications.ub.uni-mainz.de/theses/frontdoor.php?source_opus=100000507
Most of the features included are already part of the new ENVI-met 4 engine.
Our congrats to Helge and enjoy reading!
Michael Bruse, CDO
ENVI-met | Decoding Urban Nature
9th Oct 2015
ENVI-met V3.1 is no longer provided as download. User support in our forum will kept up for the next 6 months and then will be closed as well. User support and forum for LEONARO 3.x has been closed down- please only use LEONARDO 2014 now.
22nd Augst 2015
A public preview III of ENVI-met V4 is now available (see download page).
23rd Jan 2015
A new public preview of ENVI-met V4 and of the AddOn 2014 solving a number of urgent bugs (see download page) is available.