RWIND 2 | Features of RWIND Basic

RWIND 2 and RFEM 6 can now be used to calculate wind loads from experimentally measured wind pressures on surfaces. Basically, two interpolation methods are available to distribute pressures measured in isolated points across the surfaces. The desired pressure distribution can be achieved using the appropriate method and parameter settings.

Creating a validation example for Computational Fluid Dynamics (CFD) is a critical step in ensuring the accuracy and reliability of simulation results. This process involves comparing the outcomes of CFD simulations with experimental or analytical data from real-world scenarios. The objective is to establish that the CFD model can faithfully replicate the physical phenomena it is intended to simulate. This guide outlines the essential steps in developing a validation example for CFD simulation, from selecting a suitable physical scenario to analyzing and comparing the results. By meticulously following these steps, engineers and researchers can enhance the credibility of their CFD models, paving the way for their effective application in diverse fields such as aerodynamics, aerospace, and environmental studies.

Wind direction plays a crucial role in shaping the outcomes of Computational Fluid Dynamics (CFD) simulations and the structural design of buildings and infrastructures. It is a determining factor in assessing how wind forces interact with structures, influencing the distribution of wind pressures, and consequently, the structural responses. Understanding the impact of wind direction is essential for developing designs that can withstand varying wind forces, ensuring the safety and durability of structures. Simplified, the wind direction helps in fine-tuning CFD simulations and guiding structural design principles for optimal performance and resilience against wind-induced effects.

You can display the RWIND results directly in the main program. In the Navigator - Results, select the Wind Simulation Analysis result type from the list above.

Currently, the following results are available, which refer to the RWIND computational mesh:

• Surface pressure
• Surface cp coefficient
• Wall distance y+ (steady flow)

Go to Explanatory Video

Do you already know the editor for mesh refinement control? It is a great help for your work! Why? It's easy – it gives you the following options:

• Graphic visualization of the areas with mesh refinements
• Mesh refinement of zones
• Deactivating the standard 3D solid mesh refinement with transversion into the corresponding manual 3D mesh refinements.

These options help you to formulate a suitable rule for meshing the entire model, even for the models with unusual dimensions. Use the editor to efficiently define small model details on large buildings or detailed meshing areas in the coating area of the model. You will be amazed!

• Calculation of stationary incompressible turbulent wind flow using the SimpleFOAM solver from the OpenFOAM^® software package
• Numerical scheme according to the first and second order
• Turbulence models RAS k-ω and RAS k-ε
• Consideration of surface roughness depending on model zones
• Model design via VTP, STL, OBJ, and IFC files
• Operation via bidirectional interface of RFEM or RSTAB for importing model geometries with standard-based wind loads and exporting wind load cases with probe-based printout report tables
• Intuitive model changes via drag & drop and graphical adjustment assistance
• Generation of a shrink-wrap mesh envelope around the model geometry
• Consideration of environmental objects (buildings, terrain, and so on)
• Height-dependent description of the wind load (wind speed and turbulence intensity)
• Automatic meshing depending on a selected depth of detail
• Consideration of layer meshes near the model surfaces
• Parallelized calculation with optimal utilization of all processor cores of a computer
• Graphical output of the surface results on the model surfaces (surface pressure, Cp coefficients)
• Graphical output of the flow field and vector results (pressure field, velocity field, turbulence – k-ω field, and turbulence – k-ε field, velocity vectors) on Clipper/Slicer planes
• Display of 3D wind flow via animated streamline graphics
• Definition of point and line probes
• Multilingual user interface (German, English, Czech, Spanish, French, Italian, Polish, Portuguese, Russian, and Chinese)
• Calculations of several models in one batch process
• Generator for creating rotated models to simulate different wind directions
• Optional interruption and continuation of the calculation
• Individual color panel per result graphic
• Display of diagrams with separate output of results on both sides of a surface
• Output of the dimensionless wall distance y+ in the mesh inspector details for the simplified model mesh
• Determination of the shear stress on the model surface from the flow around the model
• Calculation with an alternative convergence criterion (you can select between the residual types pressure or flow resistance in the simulation parameters)