CFX Expression Language–Part 5: Using CEL for Solution Monitoring

By: Ted Harris
– May 17, 2013
Categories:

In four previous entries we introduced CFX Expression Language, CEL:

After a break to teach some ANSYS classes in beautiful northern Utah we’re back to conclude our series on CFX Expression Language.

image

In our fifth and final installment on CEL we will discuss the use of CEL in monitoring items of interest while the CFX solution is progressing. Back in the first installment in this series, we showed how to create expressions for results quantities in CFD Post. By creating expressions in similar fashion for results quantities in CFX Pre, we can use these expressions to monitor items during solution.

Here is an example. In CFX Pre we have defined three expressions which are really extracting and operating on results data.

forceX1 = resulting force on one face of the structure
forceX2 =resulting force on another face of the structure
fdiffx = the difference between these two values or the net force acting on the structure

This shows these three expressions in the CFX Pre outline tree:

image

Still within CFX Pre, click on Insert > Solver > Output Control. That will add an Output Control tab on the left side of the CFX Pre window. Click on the Monitor tab, expand Monitor Points and Expressions, and then click on the button near the right of the window below that to add a monitor point:

image

Set the Option to Expression and in the Expression Value box left click then right click to select from your list of defined expressions:

image

The CFX Pre tree will now have one or more Monitor Points listed under Output Control:

image

When we initiate the solution, these user-defined monitor points will be available for real time display in addition to the normal Momentum and Mass and Turbulent kinetic energy monitors. All we need to do is click on the User Points tab during solution to view our expressions as monitors. In the example shown below, Monitor 1 is forceX1, Monitor 2 is forceX2, and Monitor 3 is fdiffx, the difference between the first two quantities. These could have been renamed during their definition to make it easier to understand the monitor plot. Here is a snapshot of the quantities being monitored during the solution:

image

So, as we have seen in the last 5 CFX Expression Language blog entries, CEL exposes a lot of powerful capability to CFX users (and to Fluent users within CFD Post). In this case we have seen how to add additional items to monitor during the solution process. The advantages of this are to help us determine on the fly if the solution is progressing as expected and to give us an idea of the values of certain results quantities before the solution is fully completed.

We certainly hope you now have a better understanding for how CEL can be used to increase the capabilities and useful information available from CFX and CFD Post.

Categories

Certified Elite Channel Partner

Get Your Ansys Products & Support from the Engineers who Contribute to this Blog.

Product Development
Diamond Partner

Technical Expertise to Enable your Addictive Manufacturing Success.

PADT’s Pulse Newsletter

Keep up to date on what is going on at PADT by subscribing to our newsletter.


By submitting this form, you are consenting to receive marketing emails from: Phoenix Analysis and Design Technologies, 7755 S. Research Dr., Tempe, AZ, 85284, https://www.padtinc.com. You can revoke your consent to receive emails at any time by using the SafeUnsubscribe® link, found at the bottom of every email. Emails are serviced by Constant Contact

Share this post:

Share on twitter
Share on facebook
Share on linkedin
Share on pinterest

Upcoming Events

05/26/2022

Modelling liquid cryogenic rocket engines in Flownex - Webinar

05/25/2022

SMR & Advanced Reactor 2022

05/25/2022

05/24/2022

SMR & Advanced Reactor 2022

05/19/2022

RAPID + tct 2022

05/19/2022

Venture Cafe Roundtable: AI & Healthcare

05/18/2022

Tucson after5 Tech Mixer: World View

05/18/2022

RAPID + tct 2022

More Info

05/18/2022

Signal & Power Integrity Updates in Ansys 2022 R1 - Webinar

05/18/2022

Simulation World 2022

05/17/2022

RAPID + tct 2022

05/11/2022

Experience Stratasys Manufacturing Virtual Event

05/04/2022

Mechanical Meshing Updates in Ansys 2022 R1 - Webinar

04/27/2022

04/22/2022

12TH ANNUAL TUCSON GOLF TOURNAMENT

04/21/2022

04/20/2022

Additional Fluids Updates in Ansys 2022 R1

04/20/2022

Experience Stratasys Tour – Tempe Arizona

04/18/2022

Experience Stratasys Tour - Flagstaff Arizona

04/14/2022

D&M West | MD&M West

04/13/2022

D&M West | MD&M West

04/13/2022

Experience Stratasys Tour - Albuquerque New Mexico

04/12/2022

D&M West | MD&M West

04/12/2022

Experience Stratasys Tour - Los Alamos New Mexico

04/12/2022

Optimizing Engineering Workflows f​​​​or Propulsion System Design

04/07/2022

Experience Stratasys Tour - Austin Texas

04/07/2022

37th Space Symposium - Arizona Space Industry

04/06/2022

Transforming Digital Engineering with Ansys Discovery 2022 R1

04/06/2022

37th Space Symposium - Arizona Space Industry

04/05/2022

37th Space Symposium - Arizona Space Industry

04/04/2022

37th Space Symposium - Arizona Space Industry

03/30/2022

Simulation Best Practices for Vehicle Engineering - Webinar

03/23/2022

03/23/2022

High & Low Frequency Electromagnetics Updates in Ansys 2022 R1

02/24/2022

Arizona Technology Council After 5 Tech Mixer "Pandemic Pivot Pizza Pa

02/23/2022

SciTech Festival: Spend an Hour with 3D Printing Experts

02/11/2022

Webinar: Mechanical overview for Ansys 2022 R1

More Info

02/09/2022

Webinar: Product Development 101 (FAKE)

02/08/2022

Webinar: Navigating the Additive Landscape

01/27/2022

Arizona Technology Council 1st Quarter VIP Tech Mixer

More Info

01/26/2022

Simulation Best Practices for Gas Turbine Design & Development - Webin

More Info

01/19/2022

Arizona Photonics Days

More Info

11/04/2021

ExperienceIT, New Mexico

More Info

11/03/2021

Additive Manufacturing & Structural Optimization in Ansys 2021 R2 - We

More Info

11/03/2021

Optics Valley Technical Series: The Future of Simulation in the Optics

More Info

11/02/2021

SBIR Liftoff AZTC Virtual Breakfast Series

More Info

10/10/2021

Stratasys Mobile Truck Stop - Tucson Arizona

More Info

Search in PADT site

Contact Us

Most of our customers receive their support over the phone or via email. Customers who are close by can also set up a face-to-face appointment with one of our engineers.

For most locations, simply contact us: