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- Verification Example
- Wind Tunnel Size
- Computational Grid Study
- Enhanced Wall Function
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Do you have any questions about Dlubal products or need assistance in selecting the right one for your project?
I'm here to help. You can easily reach me through the contact options provided below.
Looking forward to hearing from you!
Amy Heilig, PE
CEO – USA Subsidiary | Sales Engineer
© Kunstlin Ingenieure
© Kunstlin Ingenieure
Generation of Wind Loads Based on CFD for Any Type of Structure
RWIND 3 is used to determine wind loads for buildings. In addition to a 3D model, all you need is a wind load description. The program automatically determines all other parameters for the flow simulation, so the analysis is performed at the push of a button.
RWIND 3 is a stand-alone program, but can also interact with the structural analysis programs RFEM and RSTAB.
The usual workflow includes creating a model in RFEM or RSTAB and then performing the wind analysis in RWIND using a digital wind tunnel. In this case, RWIND can optionally run in the background. The wind loads determined in RWIND are then applied to RFEM and RSTAB.
RWIND is suitable not only for buildings in structural engineering, but for all (including complex) structures.
Video: Calculation of Wind Loads with CFD Simulation
Container Structure in Digital Wind Tunnel in RWIND | © Modular Structural Consultants LLC
Calculation of Wind Loads with CFD Simulation
Calculation of Wind Loads with CFD Simulation
Video: Calculation of Wind Loads with CFD Simulation
Main Features of RWIND 3
Graphical Workspace
The graphical workspace takes up the main part of the user interface. There you can create the model, apply loads, as well as examine the results. By clicking or rotating the cube (hold down the left mouse key while moving the pointer), you can control the view. As an alternative, you can use the mouse functions to set the view.
Navigator
The navigator manages the file data in a tree structure. At the bottom edge, there are three tabs (four after the calculation). Use them to switch between the tabs that control the Data, Display, Views, and Results.
Edit Bar – Simulation
The Edit Bar – Simulation guides you through the simulation settings, including the basic control of the individual simulation results. In the window, you can find a result box, a reference to further model changes and the components for editing the results.
Simulation Parameters
The Simulation Parameters dialog boxes guide you through the settings of the wind simulation, for example: Setting of the transient flow behavior or the wind profile.
Intuitive User Interface
As in RFEM and RSTAB, the user interface of RWIND is based on the CAD concept. A navigator with an editing window ensures easy navigation and control of the simulations. In the navigator, you can find the functions required for controlling the model display, including the result display. The editing window allows you to control the simulation results, define their properties and run the individual simulations, such as the flow animation, or the display of pressure or wind velocity fields.
Moreover, RWIND provides you with an intuitive user interface, allowing you to easy control and customize your simulations. Dlubal Software is constantly working on updates and improvements of the existing features. The useful features of RWIND include:
Very Successful RWIND Simulation Webinar
The webinar about RWIND Simulation was very successful!
From now on, it is possible to analyze wind forces on geometries of objects that are not regulated in the standard. The wind force assumption according to the standard was often a more or less good estimate.
Perfect Combination
The RFEM add-on module RF-STABILITY is a perfect combination with RWIND Simulation. Using RF-STABILITY, I can perform a buckling analysis to get accurate effective lengths. Using RWIND Simulation, I can get accurate wind loads. For unusually shaped structures, it would be a wild guess if calculating wind loads from the standard code… either not conservative or too conservative. My client is happy with the results and impressed!
RFEM 6 / RSTAB 9
To model the bodies in RWIND Basic, you will find a special application in RSTAB. In this application, you define the wind directions to be analyzed using related angular positions around the vertical model axis.
RWIND 3
RWIND uses a numerical CFD (Computational Fluid Dynamics) model to simulate wind flows around your objects using a digital wind tunnel.
RWIND 3 Basic
RWIND 3 Pro
Steady Flow Calculation
Transient Flow Calculation
Steady Flow Turbulence Model: RAS k-ε, k-ω
Transient Flow Turbulence Model: Spalart-Allmaras DDES
Trajectories of Flowing Particles in Transient Flow
Permeability, Permeable Surfaces
Use RWIND 2 Pro to easily apply a permeability to a surface. All you need is the definition of the Darcy coefficient D, the inertial coefficient I, and the length of the porous medium in the direction of flow L,to define a pressure boundary condition between the front and back of a porous zone. Due to this setting, you obtain the flow through this zone with a two-part result display on both sides of the zone area.
Point Cloud Object Type
Model Editor (Model Creation, Model Repair,...)
Edit Object Functions
Terrain Editor
Auxiliary Objects
Verification Data in Probes
Calculate Your Price
Total Amount 3,300.00 USD
The price is valid for United States.
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When wind-induced surface pressures on a building are available, they can be applied on a structural model in RFEM 6, processed by RWIND 2, and used as wind loads for static analysis in RFEM 6.
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.
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.
If you have experimentally determined surface pressures available for a model, you can apply them to a structural model in RFEM 6, process them in RWIND 2, and use them as wind loads in the structural analysis of RFEM 6.
You can find out how to apply the experimentally determined values in this Knowledge Base article: Static Analysis with Wind Loads from Experimentally Measured Pressures Using RWIND 2 and RFEM 6
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)
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!
RWIND Basic uses a numerical CFD model (Computational Fluid Dynamics) to simulate wind flows around your objects using a digital wind tunnel. The simulation process determines specific wind loads acting on your model surfaces from the flow result around the model.
A 3D volume mesh is responsible for the simulation itself. For this, RWIND Basic performs an automatic meshing on the basis of freely definable control parameters. For the calculation of wind flow, RWIND Basic provides a steady solver and RWIND Pro a transient solver for incompressible turbulent flow. Surface pressures resulting from the flow results are extrapolated onto the model for each time step.
How can I find RWIND results such as forces data in ParaView?
How can I obtain wind force coefficient in RWIND?
My results of the line probe in RWIND seem implausible. Why?
My results in RWIND have changed or seem implausible. Why?
Computational Fluid Dynamics (CFD) is a powerful tool in modern engineering practice. However, as with all simulation methods, the question arises: how reliable are the results?
When importing a model to RWIND, I get a message about overlapping triangles. What should I pay attention to?
