Clean water is one of the most basic necessities of our lives. Our health depends on it. What transpired in the Flint water crisis in Michigan recently has shocked the nation. President Obama declared a state of emergency and there are demands that the Governor of Michigan steps down. It all started when, in order to reduce cost, the City of Flint officials decided to use Flint River water for residential consumption without adding orthophosphate, a chemical that coats the pipe interior thereby inhibiting any leaching of lead. Continue reading
Over the past two decades, I’ve had the good fortune to meet with product development teams in nearly every industry, attend a multitude of engineering conferences and read hundreds of case studies on engineering simulation. Without a doubt, the principle reasons driving businesses to invest in engineering simulation have been to reduce development time and costs while improving product quality. Continue reading
Winter has arrived in the northern hemisphere and with it comes snow. Snow complicates our lives — roads become slick with ice and drifts can block our way. When it piles up high on mountains, avalanches can wreak havoc.
It has now been over a decade since commercial travelers were able to experience supersonic flight on the Concorde aircraft. News items will periodically surface about the possibility of travel across the Atlantic in an hour or less, but these are usually media hype based on a recently filed patent or publication. The reality is that we are still many years away from a commercial aircraft that can match the speed of Concorde. And, this is a plane that first flew close to 50 years ago. Who knows how far away we are from the transportation technologies we were supposed to have on the recently passed Back to the Future Day, October 21st 2015. Continue reading
Flows around aerodynamic bodies, like aircraft wings, helicopter blades, wind turbines and turbomachinery components develop boundary layers that, to a large extent, define their performance. The boundary layers can either be laminar or turbulent depending on numerous factors, like Reynolds number, freestream turbulence levels and surface roughness, to name a few. Understanding which type of boundary layer is present, and the location of the laminar-to-turbulent transition point under varying operating conditions, is essential for accurate predictions of the performance of aerodynamic devices. Continue reading
In a previous blog, I shared with you my excitement about the power of the adjoint solver technology for shape optimization from ANSYS. Since then I have been working tirelessly to make this remarkable technology even more capable. CFD engineers can now understand their designs better and can perform smart shape optimization, all for larger problems with richer physics thanks to the adjoint solver technology.
My numerous interactions with people from all around the world confirmed what I knew: the adjoint solver technology is powerful and has the capability to enable a sea-change in the fluid design process. The technology is already having a positive disruptive impact on design, especially among the early adopters. Products are being improved. Established concepts about some types of fluid systems and how they function have been overturned. New manufacturing procedures are being attempted in order to produce the shapes indicated by the adjoint.
In coastal areas, hurricanes can severely damage buildings, people and cause a lot of havoc. Therefore, scientists at Florida International University (FIU) are studying hurricanes and how their effects can be mitigated using the Wall of Wind (WOW). WOW is a research facility developed by FIU’s International Hurricanes Research Center (IHRC), Miami, Florida. Continue reading
I have always been fascinated by turbomachinery: pumps, compressors, turbochargers, state-of-the-art aircraft engines etc. Anything that spins is of interest. This is one of the key reasons why I love going to work at ANSYS every day. I can contribute to creating the best turbomachinery simulation solutions.
I am often asked “What are you working on? Turbines? Compressors? Hydraulic turbines?” Well, the answer is all of the above, and more. This is because our physics solutions are not limited by machine type, material or flow regime. Similarly, our turbomachinery-specific pre- and post-processing tools apply across machine categories. Besides, complex machines such as an aircraft engine have many parts: compressor, turbine, combustion chamber, complex secondary flow channels, etc. So with each new release of ANSYS, we strive to improve the simulation solutions that we provide to our turbomachinery customers.
I am sure many of you have heard of clean diesel. And, probably asked yourself what is it and how is it different from regular diesel. Are we refining fuel more — why is it called clean? That is just one part of it. Clean diesel is really a three-part system. One part is cleaner fuel, the second part is improvement in the combustion — more advanced engines— and the third part is new technologies that control emission and exhaust gasses. There are different emission control technologies that can further reduce emission from the diesel engines, but most dominant are diesel particulate filters (DPF), exhaust gas recirculation (EGR), selective catalytic reduction (SCR) and diesel oxidation catalysts (DOC). Continue reading
“Meshing”… Usually throwing this single word to a group of structural or CFD analysts will start interesting and passionate discussions. Meshing is definitely a key part of the simulation process and requires attention. As analysts, how many hours did we or do we spend on meshing? Probably too many — especially if you have been in the simulation world for many years and started when automation of meshing was not so common. But after all, meshing is just one of the tools that we need to get accurate results and we should spend more time looking at simulation results than meshing our models. Continue reading