FAQ 004197 EN

Helpful Questions & Answers

  • Frequently Asked Questions (FAQs)

This article was translated by Google Translator

View original text

Which turbulence setting should be used for the numerical wind load generation on buildings?

Answer

The RWIND Simulation program offers an optional height-variable consideration of the k-ε or k-ω turbulence model for the numerical flow simulation. The necessary turbulence parameters can be specified manually or determined automatically from a user-defined turbulence intensity value. In the standard, a turbulence intensity of 1% is specified constantly over the wind tunnel height. This value is based on the recommendation by the CFD Support company, which has many years of experience in the field of numerical flow simulation.


Figure 01 - Effect of Turbulence Intensity

In RWIND Simulation, the turbulence model is organized in the "Parameters of Simulation" menu under the "Turbulence" tab.


The interface menu in RFEM or RSTAB organizes the turbulence model for the automated calculation of wind loads in the background in the "Simulate and Generate Wind Loads" menu under the "Wind Load" tab. In this case, the "Use uniform turbulence at inlet" function in the Turbulence Properties field creates a constant turbulence specification across the height of the wind tunnel. By deactivating this function, it is possible to specify a turbulence variable over the height. In addition to the location-specific specification of the wind velocity profile, the wind description according to the standard also automatically determines the turbulence property depending on the terrain accuracy over the height. Alternatively, you can define the turbulence property manually using the "User-defined turbulence" function in the form of table entries.



Keywords

Turbulence Wind vortex CFD Height-dependent

Downloads

Links

Write Comment...

Write Comment...

  • Views 579x
  • Updated 5 April 2021

Contact us

Contact Dlubal

Did you find your question?
If not, contact us via our free e-mail, chat, or forum support, or send us your question via the online form.

+49 9673 9203 0

info@dlubal.com

Member design according to ADM 2020 in RFEM

ADM 2020 Member Design in RFEM

Webinar 19 January 2021 2:00 PM - 3:00 PM EDT

Dlubal Info Day

Dlubal Info Day Online | 15 December 2020

Webinar 15 December 2020 9:00 AM - 4:00 PM BST

Tensile Membrane Structures and \n CFD Wind Load Simulation

Tensile Membrane Structures and CFD Wind Load Simulation

Webinar 8 April 2020 2:00 PM - 3:00 PM EDT

Membrane Structures with Wind Loads From CFD Wind Simulation

Membrane Structures with Wind Loads From CFD Wind Simulation

Webinar 24 March 2020 3:00 PM - 4:15 PM BST

RWIND Simulation - Wind Load Simulation and Generation

RWIND Simulation - Wind Load Simulation and Generation

Webinar 12 December 2019 3:00 PM - 4:00 PM

}
RWIND Simulation

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