How do I create models of neighboring buildings for a numerical flow simulation in RWIND Simulation?


In addition to the buildings 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" feature under the "Insert" menu.

Figure 01 - Importing Model

This import function allows you to import the RFEM or RSTAB models into the wind flow environment by using the *.vtp format and the stereolithography models by using the *.stl format. In the numerical wind tunnel, the imported models are organized separately in addition to the main model. An overview of the imported models is displayed in Project Navigator under "Model."

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

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

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

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

  2. Create the desired neighboring model in the copied model related to the analyzing model by 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 "Simulate and Generate Wind Loads" interface menu of RWIND Simulation.

  5. Set the focus to the first line in the "Load Cases" tab and move 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. Click "Yes" in the confirmation prompt to confirm the export of the original neighboring model and save the corresponding *.stl model.

As described above, you can add this newly created *.stl neighboring model in the original RWIND Simulation calculation by using the model import as an additional model for each 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