About John Stokes

John Stokes is Director for Aerospace Technology in the Fluid Business Unit, heading ANSYS’s development efforts targeted at aerospace industry needs for the simulation of fluid dynamics and fluid-structure interaction. John has previously had various technical and management roles in support, consulting, sales, and product management, in over 19 years with the organization. John holds undergraduate degrees in Mathematics and Mechanical Engineering from Dalhousie University and McGill, respectively, as well as a Master’s degree in Environmental Fluid Mechanics from the University of Waterloo.

What Do Airplane Winglets Do?

Airplane WingletsAir travelers can’t help but notice the ever-increasing presence of ‘winglets’ of different sizes and shapes at the tips of airplane wings. And anyone interested in fluid dynamics will no doubt have pondered what these airplane winglets do, how they improve aerodynamics, and why they are becoming almost ubiquitous on aircraft of all commercial manufacturers. Continue reading

16 Cool New Features of ANSYS Fluid Dynamics 16.0

Another release of ANSYS fluid dynamics products, another round of great new capabilities. While some may say that a picture is worth a thousand words, I invite you to view the video below for more than 16,000 words on 16 Cool New Features of ANSYS Fluid Dynamics 16.0. And they are all winners — so this is not a ranking, just a list! Continue reading

Powerfully Pragmatic Problem-Solving with CFD

The art of engineering can often be in finding pragmatic ways to use technology to solve real problems. While simulations may include an ever-increasing amount of geometric detail, it is not enough to simply generate ever finer meshes and use ever smaller time resolution. Simulations must still be solved in a reasonable time (and perhaps the one constant here has been that reasonable almost always means ‘overnight’). Therefore, until there is a dramatic breakthrough in computing power, modeling fluid flow will require engineering pragmatism in problem-solving for many years to come. But that need not be shouldered by the CFD engineer alone — ANSYS simulation software can support them in their efforts. ANSYS 15.0 contains multiple examples of how pragmatic approaches to efficient and effective simulation are contained in the software itself.

One such example is the dynamic combustion mechanism reduction capability in ANSYS Fluent. By automatically reducing the mechanisms to only the most important, dramatic reductions in simulation time can be achieved without the CFD engineer having to spend time and effort determining how to represent complex reaction mechanism in a simplified manner that models the behaviour sufficiently well. Instead, this pragmatism is built into the ANSYS software! Combined with further enhancements in ANSYS 15.0, it makes combustion simulation with even the most involved chemical reactions viable. Continue reading