The pitch drop experiment
© Image published with the permission of the University of Queensland
The Pitch drop experiment was initiated in 1927 at the University of Queensland, Australia. It consists of observing the very slow flow of a highly viscous material through a convergent, under gravity effect. In this experiment, one drop grows and falls within about a decade.
The ninth drop has fallen in April 2014; it needed about 14 years to grow and fall. One may wonder when the tenth drop will fall. Although the key material property, the viscosity, is difficult to measure, it is possible to perform a numerical simulation with ANSYS POLYFLOW software. The very long time interval involved in the experiment suggests using the month as time unit, instead of the second as is usually the case for transient cases. Of course, this requires converting the physical data accordingly. The calculation involves not only the motion of the drop from the conical reservoir into the channel; it also incorporates the development of the pitch drop under the channel exit; this is an important ingredient to the mechanism of the drop formation. Continue reading
Just wanted to let you know that it’s not too late to register for one of this week’s online learning opportunities. Simply click on the topic that interests you and register today! ANSYS webinars are always free to attend.
This week you’ll find resources for learning and teaching engineering simulation, simulation techniques to speed up innovation, best practices for meshing complex geometries and much more! Continue reading
This week’s Top 5 engineering technology articles have a new (old) way to develop a motor, a green way to deal with garbage, outer space, and in a rare tie-in — outer space garbage.
If you use ANSYS software, why not highlight your superior simulation projects in the ANSYS Hall of Fame? The sixth annual competition is open to all engineers who use ANSYS software and want to showcase their simulation excellence. Entries from around the world feature striking images and animations of real-world applications of ANSYS software using single or multiple physics. The Hall of Fame features 5 best-in-class winners (who also receive an Apple iPad) and highlights 12 finalists from two separate categories: Corporate and Academic entries. Continue reading
The University of New South Wales employs campus-wide licensing to serve many departments. Photo courtesy UNSW.
Engineering simulation products are invaluable to professors in multidisciplinary research and teaching. Students recognize the importance of simulation skills as they graduate into industry. To gain this experience students embrace simulation to write theses and participate in student competitions. However, professors and students are facing some real challenges as the use of engineering simulation ramps up.
Looking back at my notes from conversations with many engineers during our recent ANSYS Convergence Conferences, I must admit that I still came across some myths and misconceptions about high-performance computing (HPC) for engineering simulation. Let me share six really striking ones with you:
- HPC is available on supercomputers only
- HPC is only useful for CFD simulations
- I don’t need HPC – my job is running fast enough
- Without internal IT support, HPC cluster adoption is undoable
- Parallel scalability is all about the same, right?
- HPC software and hardware are relative expensive
In this blog, I’ll address — and attempt to dispel — the first 3 myths. Continue reading
Hello all! My top engineering technology picks of the week include autonomous robotics in the military, motorbike land speed records and an “unstealable” bicycle. Have a great weekend!
Recent technological developments have significantly lowered the barriers to entry in FEA and CFD, leading to excitement about the “democratization of simulation”. Employers are looking for engineers who have FEA and CFD skills in their repertoire and students are eager to pick up these skills. However, faculty have found it difficult to integrate industry-standard simulations tools into core engineering curricula for a variety of reasons including lack of teaching materials that connect simulations with existing textbook content.
The SimCafe wiki at simcafe.org is being developed at Cornell University as an e-learning resource to integrate industry-standard simulation tools into courses and to provide a resource for supplementary learning. Professors and students around the world use simcafe.org for free to teach and to learn simulations. SimCafe learning modules on FEA and CFD cover a broad spectrum of subjects: solid mechanics, fluid dynamics and heat transfer. Short embedded YouTube videos demonstrate the software steps. Continue reading