How do I create neighboring building models for the numerical flow simulation in RWIND Simulation?


In addition to the building to be analyzed, the RWIND Simulation program allows you to consider neighboring buildings in the numerical wind tunnel. To do this, the program provides the 'Import Model from File' function in the 'Insert' menu.

Figure 01 - Importing Model

With this import function, RFEM or RSTAB models can be imported into the wind flow environment via the *.vtp format and stereolithography models via the *.stl format. The imported models are organized separately in the numerical wind tunnel next to the main model. An overview of the imported models is shown in the project navigator under the 'Model'.

The additionally imported models are implemented in the simulation environment similar to the main model and considered in the overall analysis. At the end of the calculation, the program displays the wind flow and resulting surface pressures on the main model and all imported add-on models.

The *.vtp format is currently only used internally for the exchange of data between RWIND Simulation and RFEM or RSTAB.

If there is no *.stl format available from the neighboring models, it is possible to create a corresponding *.stl model by using the model export function in RWIND Simulation. To do this, proceed as follows:

  1. Save the model to be analyzed under a new name.

  2. Create in the copied model related to the analyzing model the desired neighboring model using member, surface and solid elements.

  3. Delete the model to be analyzed so that only the neighboring model remains in the environment

  4. Open the RWIND Simulation interface menu 'Simulate and Generate Wind Loads'

  5. Set the focus to the 1st line in the 'Load Cases' tab and push the neighboring model into the wind tunnel with the 'Open in RWIND Simulation' function.

  6. Right-click the neighboring model in RWIND Simulation and select the 'Export Selected Models' function

  7. Confirm the export of the original neighboring model with 'Yes' in the confirmation prompt and save the corresponding *.stl model.

As described above, this newly created *.stl neighbor model can be added in the original RWIND simulation calculation via the model import as an additional model per wind direction with a model transformation affine to the main model.


STL Neighboring building Interaction


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RFEM Main Program
RFEM 5.xx

Main Program

Structural engineering software for finite element analysis (FEA) of planar and spatial structural systems consisting of plates, walls, shells, members (beams), solids and contact elements

Price of First License
3,540.00 USD
Compatible Programs RWIND Simulation
RWIND Simulation 1.xx

Stand-Alone Program

Stand-alone program for numerical simulations of wind flow around buildings or any other objects. The generated wind loads acting on these objects can be imported into RFEM / RSTAB programs for static and dynamic analysis.

Price of First License
2,690.00 USD