CFD Cookie 2 - Exploring RANS Models in OpenFOAM: Spalart-Allmaras - Part 10

👉 Turbulence models in OpenFOAM | Theory and numerical pointers 😲 RANS simulation using the Spalart-Allmaras Turbulence model 🤓 Some comments on the wall function options 🥸 Near wall treatment general theory 🤠 Zero Pressure Gradient Flat Plate – Re = 10 000 000 👌 00:00 Introduction 00:20 Near wall treatment - General theory 14:44 The Spalding law | A reference paper 15:10 The y* definition by Launder and Spalding | A reference paper 16:17 On the wall boundary condition for turbulence models | A referecnce paper 17:49 Let's study the wall modeling case with different wall functions | HRE case 28:00 Near wall treatment and wall functions in OpenFOAM - A summary table 28:58 Let's take a look at the wall resolving case with different wall functions | LRE case 32:48 Let's launch a wall resolving case and monitor the residuals on-the-fly 33:25 Let's post-process the solution of the wall resolving case | LRE case 34:01 Final remarks This CFD cookie 🍪 is based on OpenFOAM 12, but the general guidelines and standard practices should work with any OpenFOAM version. 🤔 We also address the following question (CFD cookie 1): Without reference results (experimental, analytical, etc.), how do I know that my turbulent Multiphysics simulations are correct? You can find CFD cookie 1 at the following link: 👈 https://www.youtube.com/playlist?list=PLoI86R1JVvv84fPYoTZWkXUdWirTtHFiA 🤪 This cookie has been approved by the 🍪 cookie monster 🧟. Training material repository https://drive.google.com/drive/folders/10tK8PPZbmrvudK0a78yFxvdXYDn6E2Dc?usp=sharing Useful links: https://turbmodels.larc.nasa.gov/ https://www.wolfdynamics.com/tools.html?id=110 Useful references: B. E. Launder, D. B. Spalding. The Numerical Computation of Turbulent Flows. Computer Methods in Applied Mechanics and Engineering. 1974. D. Spalding. A single formula for the law of the wall. J. of Applied Mechanics. 1961. J. Bredberg. On the Wall Boundary Condition for Turbulence Models. Internal Report 00/4. Department of Thermo and Fluid Dynamics. Chalmers University of Technology. 2000. P. Spalart, S. Allmaras, A One-Equation Turbulence Model for Aerodynamic Flows, Recherche Aerospatiale, No. 1, pp. 5-21, 1994. P. Spalart, Philosophies and fallacies in turbulence modeling. Progress in Aerospace Sciences, Volume 74, April 2015, Pages 1-15 ********************************************************************************** Wolʇ Dynamics, your reliable partner for CAE solutions, CAD and solid modeling → Meshing → Simulations → Automation and optimization → Post-processing → Data analytics and ML → Reporting http://www.wolfdynamics.com/ Why Wolʇ Dynamics? Simply look at our banner - notice how the F appears backwards. Wolʇ Dynamics ↔ Flow Dynamics 😯+💣=🤯 **************************************************************************** 👉 Subscribe and hit the bell to see new videos or we will go back to OpenFOAM 3: https://www.youtube.com/channel/UCNNBm3KxVS1rGeCVUU1p61g?sub_confirmation=1 🖖 Join our channel to help us create more content. By joining our channel, you can also get access to perks: https://www.youtube.com/channel/UCNNBm3KxVS1rGeCVUU1p61g/join Follow us: Twitter → twitter.com/WolfDynamics LinkedIn → linkedin.com/company/wolf-dynamics **************************************************************************** Wolf Dynamics makes no warranty, express or implied, about the completeness, accuracy, reliability, suitability, or usefulness of the information disclosed in this training material. This training material is intended to provide general information only. Any reliance the final user place on this training material is therefore strictly at his/her own risk. Under no circumstances and under no legal theory shall Wolf Dynamics be liable for any loss, damage or injury, arising directly or indirectly from the use or misuse of the information contained in this training material. **************************************************************************** #cfd #cae #turbulence #openfoam #computationalfluiddynamics #aerospace #RANS