To what extent are the results of the RWIND Simulation calculation compatible with the valid wind standards (e.g. EN 1991-1-4, ASCE/SEI 7, etc.)?

Answer

The RWIND Simulation is a program for numerical flow simulation . It is a tool for describing a wind flow problem around an object consisting of a system of partial differential equations with the output of an approximate solution on the basis of the finite-volume method. Such a mathematical model provides similar to a simplified model in a real wind tunnel information about the wind velocity field and the pressures acting on the surfaces of the wind flow object.

The standards describing wind effects on buildings and structural components (e.g. EN 1991-1-4, ASCE/SEI 7, etc.) are based on different principles. The rules and measures specify corresponding instructions for determining the wind loads for specific situations and applications. These formulas are undoubtedly correct for the assigned situations and the resulting values have been confirmed in practice.

However, these guidelines do not describe all situations that occur in the real world of engineers. Here, infinitely different model shapes in the wind flow are processed, whereby each shape has its own high-grade influence on the resulting surface pressures caused by the wind load. However, for all model shapes not mentioned in the respective directives, the equivalent load from wind effects remains unclear.

RWIND Simulation can help here in its role as an auxiliary tool for determining the resulting forces from the wind action. However, despite the use of RWIND Simulation, all requirements of the valid standardization must be ensured. The technology used in the simulation program may also provide further useful insights for sufficiently controlled object shapes.

Figure 01 - Wind Flow Around Complex Antenna System
Figure 02 - Surface Pressures on Complex Antenna Installation due to Wind Load

Keywords

Wind load Wind standard CFD Flow simulation Pressure coefficient Turbulence FVM

Reference

[1]   Eurocode 1: Actions on structures - Part 1-4: General actions - Wind actions; German version EN 1991-1-4:2005 + A1:2010 + AC:2010
[2]   ASCE/SEI 7‑16, Minimum Design Loads and Associated Criteria for Buildings and Other Structures

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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