Elements of Turbulence Modelling
Two-session NAFEMS e-learning course
August 3rd - August 10th 2016
06:00 PDT / 09:00 EDT / 14:00 BST / 15:00 CEST
Two-Session Online Training Course - 2 hours/session and one session/week
This course has been expanded from the original one session to two sessions, in order to cover even more content and allow more time for questions and tutor interaction.
Note: Once you register for the course using the "order" button (look right), you will receive a confirmation e-mail. Please click here to view the FAQ section, or if you need to contact NAFEMS about this course.
The majority of flows in nature and in engineering applications are turbulent. Turbulent flow fields are three dimensional, chaotic, diffusive, dissipative, and random. These flows are characterized by velocity fluctuations in all directions with infinite number of scales. Exact analytical solution of Navier-Stokes equations for turbulent flows is not currently possible since these equations are elliptic, non‐linear, and coupled.
Furthermore, direct numerical simulation (DNS) of turbulent flows is not currently practical due to significant computational resources required. So far, direct numerical simulation approach has only been applied for a limited class of simple low Reynolds number applications.
Presently, turbulence modelling based on Reynolds-Averaged Navier Stokes (RANS) equations is the most common and practical approach for turbulence simulation. RANS are time-averaged modification of Navier-Stokes equations and turbulence models are semi-empirical mathematical relations that are used to predict the general effect of turbulence. The objective of turbulence modelling is to develop equations that will predict the time-averaged velocity, pressure, and temperature fields without calculating the complete turbulent flow pattern as a function of time. Unfortunately, there is no single universally accepted turbulence model that works for all flows and all regimes. Therefore, users have to use engineering judgement to choose from a number of different alternatives sine the accuracy and effectiveness of each model varies depending on the application.
Course Process and Details
This course is completely code independent - No software is required.
Successful application of turbulence modelling requires engineering judgement depending on physics of the flow, accuracy, project requirements, turnaround time, and computational resources available.
This course offers the attendees the practical knowledge for using turbulence modelling for complex engineering applications.
Through a simple and moderately technical approach, this course describes why we need turbulence modelling and how these models represent turbulent flows. Various approaches and number of popular turbulence models will be discussed along with advantages and disadvantages of these models. Many of the governing and transport equations will be presented for illustration purposes and may not be dealt in depth in this course. Strong effort is made for the course to be software neutral. However, examples from some of the more well known and popular simulation cases and software will be used throughout the session.
Full notes are provided for the attendees.
Students will join the audio portion of the meetings by utilizing the VoIP (i.e. headset connected to the computer via headphone and microphone jacks) or by calling into a standard toll line. If you are interested in additional pricing to call-in using a toll-free line, please send an email to: e-learning @ nafems.org .
Who Should Attend?
This course will be valuable to all engineers aiming to use Computational Fluid Dynamics as a reliable predictive tool for complex flow problems. The target audience for this course is practising engineers who wish to learn more about how to choose and apply effective turbulence modelling in their CFD analysis. Ideally, the participant should have some knowledge of Computational Fluid Dynamics analysis, but this is not essential. The material that is presented is independent of any particular software package, making it ideally suited to current and potential users of all commercial and non-commercial CFD software systems.
- Understanding turbulence
- Turbulence energy cascade & vortex stretching
- Turbulence scales
- Turbulence generation and destruction
- Discussion on DNS & LES
- Turbulent stresses
- RANS simulation
- Turbulence modelling
- First order models: One-equation & Two-equations models
- Wall integration & wall function
- Detached eddy simulation
- Model comparison: advantages and disadvantages
- Model Validations
Feedback from former e-Learning students:
"This course did everything right. From organization to presentation to interaction, this is a good model for what online training should be."
"Super! Doesn't get better than this. Good idea to start having e-Learning courses."
"I'm really happy not to pay a big fraction of my annual training budget to airlines and hotels. A BIG plus to e-learning."
Telephony surcharges may apply for attendees who are located outside of North America, South America and Europe. These surcharges are related to individuals who join the audio portion of the web-meeting by calling in to the provided toll/toll-free teleconferencing lines. We have made a VoIP option available so anyone attending the class can join using a headset (headphones w/ microphone) connected to the computer. There is no associated surcharge to utilize the VoIP option, and is actually encouraged to ensure NAFEMS is able to keep the e-Learning course fees as low as possible. Please send an email to the e-Learning coordinator (e-learning @ nafems.org ) to determine if these surcharges may apply to your specific case.
Just as with a live face-to-face training course, each registration only covers one person. If you plan to register a large group (10+), please send an email to e-learning @ nafems.org in advance for group discounts.
For NAFEMS cancellation and transfer policy, click here.
Event Type: Course
Location: e-Learning Online
Date: August 3, 2016
Dates don't work for you?
Complete the form below, and we'll notify you when this course is next available.
Wednesday August 3rd
Wednesday August 10th
Why an e-Learning Class?
In the current climate travel and training budgets are tight. To help you still meet your training needs the following e-learning course has been developed to complement the live class.
E-learning classes are ideal for companies with a group of engineers requiring training. E-learning classes can be provided to suit your needs and timescale. Contact us to discuss your requirements.