Utilize the "Clip Model" function to cut off parts of the model in RWIND Simulation.
This video is an extension of the RWIND Simulation manual by Dlubal Software.
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General
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Knowledge Base
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Since wind on laterally open structures is not addressed in the Eurocode, the 4 cases of the German DIN 1055, Part 4 are referenced.
Structures react differently to wind action depending on stiffness, mass, and damping. A basic distinction is made between buildings that are prone to vibration and those that are not.
The wind load of rectangular rounded structural components is a complex matter. The equivalent forces from wind load depend on the strength of the circulating wind load and the component geometry.
The following study compares the wind pressure on a tall building obtained by RWIND Simulation with the results published by Dagnew et al. at the 11th Americas Conference on Wind Engineering in June, 2009. In this paper, the Commonwealth Advisory Aeronautical Council (CAARC) building is used as a model, and the results of several different numerical methods are compared with experimental data obtained from wind tunnels.
In RWIND Simulation, it is possible to divide the model in different zones. This allows for different surface roughness to be assigned to the zones. In addition, local results can be better evaluated.
The volume space in RWIND Simulation can optionally be discretized with the second-order theory between the cells.
This extended approach usually results in more accurate results despite poorer convergence behavior.
Utilize the RWIND Simulation program to consider a surface roughness of the model surface by applying a modified wall boundary condition. The numerical model is based on the assumption that grains with a certain diameter are arranged homogeneously on the model surface, similar to sandpaper. The grain diameter is described with the parameter Ks and the distribution with the parameter Cs. By considering the wall roughness, the numerical flow simulation can capture reality more closely.
The meshing algorithm of RWIND Simulation uses the boundary layer option to mesh the area near the model surface with a voluminous layer mesh. The number of layers is controlled by a user-defined parameter.
This fine mesh in the area of the model surface helps to represent the wind velocity close to the surface.
I have defined a wind profile for RWIND Simulation up to a height of 100 m. Is the wind profile dependent on the size of the wind tunnel?
How can I delete the RWIND Simulation results in an RFEM or RSTAB model?
Is it possible to display the RWIND Simulation results in ParaView?
How is the Cp coefficient of the surface result determined in RWIND Simulation?
How is the entry of the turbulence intensity related to the profile of the turbulence intensity in the RWIND Simulation program?
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?
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