Search found 19 matches

by marmuebn3
Fri Jan 15, 2021 12:16 pm
Forum: ENVI-met 4 (Main Simulation Model)
Topic: dE/dt and dEps/dt problems leading to Envi-met discontinuation
Replies: 15
Views: 76

Re: dE/dt and dEps/dt problems leading to Envi-met discontinuation

Hi Tim, thank you for the hint. Checking the profiles I cannot fin extreme values for albedo or any other property. The albedo of Loamy Soil is exact zero (a very bit too low I think), the others vary between 0.2 and 0.8 (0000PL Concrete Pavement Light). I'm not having so much experience, but from m...
by marmuebn3
Fri Jan 15, 2021 10:24 am
Forum: ENVI-met 4 (Main Simulation Model)
Topic: dE/dt and dEps/dt problems leading to Envi-met discontinuation
Replies: 15
Views: 76

Re: dE/dt and dEps/dt problems leading to Envi-met discontinuation

Hi Tim, thank you for the response! About the forcing file I can't follow you, may be I misunderstand you. Looking into the .for-file I can see, that it contains "data" for all the year, most invalid resp. missing values, but exactly from June 23rd to June 24th noon there are data in the forcing fil...
by marmuebn3
Fri Jan 15, 2021 8:58 am
Forum: ENVI-met 4 (Main Simulation Model)
Topic: dE/dt and dEps/dt problems leading to Envi-met discontinuation
Replies: 15
Views: 76

Re: dE/dt and dEps/dt problems leading to Envi-met discontinuation

Hi Tim, I fixed the wall problem, flattend the domain by switching off the DEM and simplified the building structure a bit, BUT I couldn't get rid of the dE/dt > 200 resp. dEps/dt > 200 problem. During 3D initialisation of all variables - calculating new turbolence max change dE/dt is growing steadi...
by marmuebn3
Thu Jan 14, 2021 12:15 pm
Forum: ENVI-met 4 (Main Simulation Model)
Topic: dE/dt and dEps/dt problems leading to Envi-met discontinuation
Replies: 15
Views: 76

Re: dE/dt and dEps/dt problems leading to Envi-met discontinuation

Hi Tim, thank you for your replay! Its not the best message, that you do not recommend simulations with DEM at present time. To be true, at least in the 3D-View within SPACES I could not recognise that the model area is like on a base standing on the level of the added grids around the model borders...
by marmuebn3
Wed Jan 13, 2021 11:41 am
Forum: ENVI-met 4 (Main Simulation Model)
Topic: dE/dt and dEps/dt problems leading to Envi-met discontinuation
Replies: 15
Views: 76

dE/dt and dEps/dt problems leading to Envi-met discontinuation

Hello together, I'm facing problems with my simulation: After some dE/dt>200 Instability resp. dEps/dt>200 Instability warning-messages ENVI-met stops after multiple Max. dE/dt messages. In an earlier post Tim recommended check of the building structure in the problematic areas (according to the out...
by marmuebn3
Mon Jan 11, 2021 8:15 pm
Forum: ENVI-met 4 (Main Simulation Model)
Topic: SPACES - Access violation
Replies: 6
Views: 33

Re: SPACES - Access violation

In the mentioned simulation with the walls problem I receive a lot of WARNING: dE/dt>200 Instability resp. dEps/dt>200 Instability messages from the borders ans from grid points within the area (more than 60 grids away from the border). I fear that ENVI-met will finally crash after a while. Couls th...
by marmuebn3
Mon Jan 11, 2021 8:00 pm
Forum: ENVI-met 4 (Main Simulation Model)
Topic: SPACES - Access violation
Replies: 6
Views: 33

Re: SPACES - Access violation

Hi Tim, about the walls problem: I havn't checked in detail, but it seems (according to the number of messages) that almost every building has no walls. The buildings have been imported from OSM and have been individualy got a height and (in the import dialog) default values otherwise. Am I able to ...
by marmuebn3
Mon Jan 11, 2021 4:57 pm
Forum: ENVI-met 4 (Main Simulation Model)
Topic: SPACES - Access violation
Replies: 6
Views: 33

Re: SPACES - Access violation

Not really, it was my 1st attempt with that model, but inbetween I found that using the dialog within SPACES instead of that within the Model Analyser is working without a problem. Maybe, I should change the topic, but checking the input files a found lots of errors like: Logic Error: A wall is requ...
by marmuebn3
Mon Jan 11, 2021 3:09 pm
Forum: ENVI-met 4 (Main Simulation Model)
Topic: SPACES - Access violation
Replies: 6
Views: 33

SPACES - Access violation

Hello together, in order to follow Model Analyser's recommendations I' trying to add 5 empty grid cells at the core border through the "Adjust Geometry and Spacing" field. Doing that, I immediately gain an error message: Access violation at address 000000000D8B91A in module 'Spaces.exe'. Read of add...
by marmuebn3
Mon Jan 04, 2021 8:15 pm
Forum: ENVI-met Monde
Topic: Topography and building heights
Replies: 5
Views: 67

Topography and building heights

Hello at all, first: happy and healthy new year! My question - may be, its about misunderstanding some features: I created a complex city (only DEM and buildings yet) in MONDE in order to simulate some cutouts in different simulations. To start, I exported a subaerea from MONDE to SPACES (2.5D), in ...
by marmuebn3
Wed Dec 23, 2020 5:06 pm
Forum: ENVI-met Monde
Topic: Monde: Access violation
Replies: 1
Views: 47

Monde: Access violation

Hello together, I'm trying to generate an ENVI-met modell in Monde. I defined a GIS-Layer with buildings (and attributes such as hight, bottom) and exportet them to a Modelling layer. Topography is defined (imported), a subaera too. Pushing then the "Create ENVI-met Modell ..."-Button I'm getting a ...
by marmuebn3
Thu Dec 10, 2020 2:26 pm
Forum: ENVI-met Monde
Topic: Just a wall
Replies: 1
Views: 30

Just a wall

Hello together, I trying a region, that has a lot of simple (brick-, concrete-)walls (as fencing and as a noise protection). As walls are a massive obstacle to the wind, I have to represent them in the model. I could represent them as a slim buildings, but walls don't have heating, volume etc. Also ...
by marmuebn3
Thu Nov 19, 2020 1:00 pm
Forum: ENVI-met Monde
Topic: editing buildings
Replies: 7
Views: 97

Re: editing buildings

Hello, another question about editing buildings in MONDE: Buildings in ENVI-met MONDE seem to be generally cuboid and have one particular height. In a small scaled (dy = dy ~ 2m) model I like to approach gable roofed buildings. To do that, I place three cuboid buldings that share one wall (respectiv...