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Air Flow Expert Working to Make Sure New Jet Fighters Take Flight — and Land — Safely
The next generation of jet fighters are being designed to be both stealthy and high-speed and, as part of this makeover, their geometry will be unique and won’t include a vertical tail. The new design will improve the aircraft’s maneuvering, minimalize its visibility, and improve its overall performance — but it will also decrease the aircraft’s performance during takeoff and landing. Miki Amitay, an endowed professor of mechanical, aerospace, and nuclear engineering at Rensselaer and the director of the Center for Flow Physics and Control (CeFPaC), is an expert in this type of problem. With the support of a new grant from the Office of Naval Research, Amitay and his team will use their extensive knowledge of flow physics to determine how air flow will affect these new jet fighters and how that flow can be manipulated or changed for optimal operation. More specifically, the team will use state-of-the-art wind and water tunnels within CeFPaC to research the flow physics associated with this new plane geometry and then explore options for mitigating difficult flow conditions during takeoff and landing. Those options can’t include changing the shape of the plane itself, so the researchers will employ active flow techniques they have developed. For example, Amitay has developed almost weightless actuators that can electrically generate a strong jet — called a synthetic jet — that pushes out puffs of air in such a way that it helps control the flow of air around various parts of the aircraft at specific and optimal times. Amitay is available to talk about the flow physics associated with aircraft flight and new technologies — like his synthetic jet — that can improve performance, efficiency, and safety.
Georgia Southern University saw a significant increase in grant and contract funding awarded to its faculty for research in the 2020 fiscal year. Georgia Southern faculty and staff received 144 awards totaling $10.7 million, which represents nearly a 67% increase over the previous year. The University received $6.4 million in FY2019 and $5.6 million in FY2018. This year marks the first time that faculty-led research at Georgia Southern broke the $10 million threshold. Vice Provost for Research Christopher Curtis, Ph.D., praised the faculty for their achievements. “These are highly competitive awards from the state, the federal government and private enterprises,” he said. “To grow our research portfolio in a national environment of diminishing funding is truly remarkable and a testament to the intellectual firepower and creativity of our professors. Georgia Southern is a Public Impact Research university, which means that the success of these researchers will be felt well beyond the confines of the University and will extend across the region.” Faculty engage in research that contributes significantly to the University’s $1.4 billion economic impact on the coastal region and that makes Georgia Southern a leading Public Impact Research university in the Southeast. The Allen E. Paulson College of Engineering and Computing, the College of Science and Mathematics and the Jiann-Ping Hsu College of Public Health each received over $2 million in sponsored awards in FY2020. If you have any questions about the faculty research being conducted at Georgia Southern University, or if you are a journalist looking to cover this topic - let us help. Christopher Curtis is the Vice Provost for Research at Georgia Southern University. Simply click on his icon to arrange an interview today.
VCU Engineering researchers are working to make clean energy easier and cheaper
Lane Carasik, Ph.D., assistant professor in VCU’s Department of Mechanical and Nuclear Engineering, is developing methods to make clean energy more cost-effective. He’s motivated by a simple principle. “The cheaper we make renewable and clean energy, the easier it is to implement it,” he said. With $100,000 in seed funding from the Jeffress Trust Awards Program, Carasik and his Fluids in Advanced Systems and Technology (FAST) research group are designing efficient, low-cost enhancements to equipment used in solar, nuclear and geothermal energy systems. Jeffress Trust awards support high-impact, one-year projects that integrate computational and quantitative scientific methodologies across a broad range of scientific disciplines. These energy systems use heat exchangers, which take energy from heat generation components and convert it to electricity. Heat exchangers usually comprise two working substances such as water, steam or air separated by tubes or plates. The FAST research group is optimizing a specialty insert that can be placed inside a heat exchanger’s tubes to improve performance. To visualize the insert’s form, imagine holding a piece of metal tape in both hands and gently twisting it. See the FAST Lab and examples of the heat transfer enhancements being designed there. “A liquid running through a tube is relatively undisrupted by the geometry of the tube or the shape of the fluid,” Carasik said. “But this twisted tape component spins the fluid. This increases turbulence, which increases heat transfer.” While “twisted tape” inserts are already in use in some advanced energy systems, the process of fabricating them has been limited by mechanical constraints. Typically, the inserts are placed inside a tube and tack welded at either end. But because of the metal’s limited tensile strength, these inserts can only be twisted a little before they break down and cause manufacturing defects. 3D printing, on the other hand, allows for a more complex — and effective — insert that can be used to characterize heat transfer performance. “With additive manufacturing, you can actually print tighter, ‘twistier’ versions of them,” Carasik said. “You can also add your own intentional defects to find out how to make the heat transfer better and improve the performance of the whole system.” Each geometric form the research group prints and tests starts with a world of calculations: thermal-hydraulics design calculations, solid geometry, material properties and more. From there, components are computer-designed, then printed in the Mechanical and Nuclear Engineering Innovation Lab. Finally, they are tested in the FAST research group’s Modular Separation Effects Testing Facility (MSEFT), a scaled testing loop that emulates the operating conditions experienced by these components. Undergraduates — even first-year students — participate in each step of the process, alongside Carasik, postdoctoral research associate Cody Wiggins, Ph.D., and doctoral student Arturo Cabral. “I really like getting students into research early on, Carasik said. “By the time they’re three years in, they’re working at a level I would expect from bachelor’s level engineers in industry.” Senior Meryem Murphy was curious about undergraduate research but had never really participated. “One day, I was arguing with Arturo about something and Dr. Carasik said, ‘If you’re like this all the time, you should work for the lab.’” She took him up on it and spent her junior year working on an MSEFT redesign and running an experiment to see if 3D-prototyped concepts can be replicated with test metals. Over the summer, Murphy interned with Atomic Alchemy, a medical radioisotope startup in Boise, Idaho. She said the position built on the hard, and soft, skills she gained in the lab. “Sometimes in class, you’re required to collaborate,” she said. “But in research, it’s just ‘what you do’ to get it done.” Rising sophomore Ryan McGuire is also looking forward to starting his second year in the lab. During his freshman year, McGuire helped develop a 3D printing technology to duplicate sequences of 3D-printed parts for the FAST research group. It’s called Retrospective Additive Manufacturing Sequencing — RAMS for short. McGuire said the thrill of solving problems in the lab has made him reassess his own goals. “When I was younger, I wanted to be [famous],” he said. “But now I no longer want to be famous. Research seems like more fun.” Upon hearing about McGuire’s change in priorities, Carasik said, “Researchers can be famous too, and for good reason.”
Environment-Friendly Compound Shows Promise for Solar Cell Use
A widespread transition to solar energy will depend heavily on reliable, safe, and affordable technology like batteries for energy storage and solar cells for energy conversion. Nikhil Koratkar, an endowed professor of mechanical, aerospace, and nuclear engineering at Rensselaer, has dedicated much of his research to exploring ways to make a wide-range of batteries more efficient, affordable, and safe. In research published in Advanced Functional Materials, Koratkar and a team of engineers, material scientists, and physicists demonstrated how a new material — a lead-free chalcogenide perovskite — that hadn’t previously been considered for use in solar cells could provide a safer and more effective option than others that are commonly considered. “The National Academy of Engineering has defined 14 grand challenges; one of those is to make harvesting energy from the sun cheaper and more widespread,” Koratkar said. "That’s the motivation of this work, to come up with new materials that could rival the efficiency of silicon, but bring down the cost of manufacturing solar cells, and that is the key to achieving this goal.” Koratkar is available to talk about this recent discovery, and his broader expertise and research in energy storage.
With Hurricane Season Underway, What Have Engineers Learned from Previous Storms?
With hurricane season already underway and projected to be active, communities need to make sure they have learned the lessons from previous major storms so that they are prepared for the next one. As the technical director for the Network for Earth Engineering Facility at Rensselaer Polytechnic Institute and an expert in centrifuge modeling, Tarek Abdoun can provide that insight. Abdoun led a research team that used physical models within the Rensselaer centrifuge to determine how some of the levees in New Orleans failed during Hurricane Katrina. Those findings have provided engineers with a better understanding of how levees respond to extreme floods. Abdoun is available to talk about what engineers have been able to learn since Katrina, and how that makes levees and dams safer.
How Can Structures Resist the Damaging Power of Wind During Hurricane Season?
Experts are forecasting an active hurricane season, which has the potential to wreak havoc on communities if they are not adequately prepared. Chris Letchford, an expert in wind engineering and the head of the Department of Civil and Environmental Engineering at Rensselaer Polytechnic Institute, studies how wind and ocean waves interact and how structures withstand wind. Letchford is available to speak about the destructive power of extreme wind and how structures can be built or augmented to mitigate damage.
Featuring: B. Frank Gupton, Ph.D. A former process development executive in the pharmaceutical industry, B. Frank Gupton, Ph.D., was coaxed out of retirement to teach in the Department of Chemical and Life Science Engineering at Virginia Commonwealth University. Gupton, whose research focuses on improving health care by making pharmaceutical production cleaner and more cost-effective, is founder and CEO of the Medicines for All Institute (M4ALL), based in the VCU College of Engineering. The institute began with a simple idea: expand global access to lifesaving medications by producing them more efficiently. The institute’s team of chemical engineers and chemists demonstrated compelling results with its first target, the anti-HIV/AIDS drug nevirapine. As the researchers continue to work on additional therapies for HIV/AIDS treatment and other diseases, M4ALL is now working with a manufacturer in South Africa and partnering with the government of Ivory Coast to bring their advances to the places they are most needed. VCU Engineering’s experts are available to speak about how M4ALL is transforming pharmaceutical engineering and improving access to medicines around the world. Gupton is the Floyd D. Gottwald Junior Chair in Pharmaceutical Engineering, professor and chair of the Department of Chemical and Life Science Engineering. An award-winning researcher and National Academy of Inventors Fellow with multiple patents, he is an expert in his field. Simply click on his icon to arrange an interview.
As the COVID-19 pandemic unfolded and healthcare organizations began experiencing shortages of personal protective equipment (PPE), faculty, staff and students at Georgia Southern University stepped up to fulfill a need. Making use of the 3D printers on the Statesboro and Armstrong campuses, as well as at the FabLab at the Business Innovation Group’s (BIG) downtown Statesboro location, the campus communities quickly began production of protective face shields and respirators. “We can’t afford to sit back and wait for things to happen,” said Dominique Halaby, DPA, director of the BIG. “We have to make them happen. We have this responsibility to make a difference, to be a part of that front line, whether it’s immediately in our community, our state or our respective area.” To date, the Department of Manufacturing Engineering has sent 200 3D-printed protective face shields with headbands to Augusta, Georgia, for healthcare workers at Augusta Medical Center, while the BIG has sent 100 face shields and 10 “Montana Masks,” a 3D-printable respirator filtration mask that can be fitted to a healthcare provider’s face and sanitized between uses, to Atlanta-area hospitals. The Department of Mechanical Engineering on the Armstrong Campus has also printed Montana Masks that will be delivered to workers in the St. Joseph’s/Candler Hospital System (SJCHS) in Savannah, Georgia, while the Respiratory Therapy Program in the Waters College of Health Professions donated 10 ventilators to the Georgia Emergency Management Agency. “I am unbelievably proud of our faculty, staff and students who have their own families to take care of, but are putting themselves on the line to help our medical professionals in this time of critical need,” said Mohammad Davoud, Ph.D., dean of the Allen E. Paulson College of Engineering and Computing. Wayne Johnson, Ph.D., professor of mechanical engineering, believes providing these materials to the Savannah community during a time of critical need is reinforcing a longtime commitment to the region. “The Armstrong Campus of Georgia Southern has a long history of working within the Savannah community, and during this pandemic, it was especially important for mechanical engineering faculty and students at the Armstrong Campus to step up during a time of great need,” said Johnson. “ Our work with SJCHS to develop, test and donate 3D-printed respirators may also lead to other research and development collaborations in the post-COVID-19 future.” In addition to benefiting area healthcare workers, Johnson believes this project is a great way for students to put their classroom skills into practice. If you would like to learn more about how the students, staff and faculty at Georgia Southern University are helping out during the COVID-19 crisis – the let our experts help. Wayne Johnson is an expert in additive manufacturing, mechatronics, biomechanics and engineering education. He is available to speak with media about this great initiative, simply click on his icon to arrange an interview today.
Precautionary Buying During a Disaster Can Create Other Challenges
After many stores sold out of necessities like toilet paper, paper towels, masks, cleaning products, and hand sanitizer, retailers across the United States are implementing purchasing limits on certain items as governmental leaders urge citizens to pace their buying habits during the COVID-19 pandemic. José Holguín-Veras, an endowed professor of civil and environmental engineering at Rensselaer Polytechnic Institute and director of the Center for Infrastructure, Transportation, and the Environment, has studied this type of precautionary buying that happens before and after a disaster. These purchases are a natural human reaction to concern over potential shortages, but Holguín-Veras says they can also be problematic. After the Tohoku earthquake and tsunami disasters in Japan in 2011, Holguín-Veras found that demand for goods doubled. Following Superstorm Sandy, he learned that this type of demand removed critical supplies from the local area, delaying response as products had to come from further away. Holguín-Veras is available to speak about how this logistical stress can affect the overall disaster response, as well as initiatives that could lessen that impact including: agreements with key private-sector vendors to ensure critical supplies, campaigns to educate the public, and rationing and demand-management policies.
Rensselaer Team Seeks Alternative Approach to Controlling Viruses
As researchers worldwide scramble to formulate a vaccine to combat COVID-19, a team at Rensselaer Polytechnic Institute is pursuing a potentially powerful solution to pandemic control: a viral trap that is easily adapted to different classes of viruses, enabling a “plug-and-play” approach to virus detection and antiviral activity. Jonathan Dordick, an endowed professor of chemical and biological engineering at Rensselaer, and Robert Linhardt, an endowed professor of chemistry and chemical biology, said the team is exploring how their work — in the areas of viral detection, therapy, and inhibition — could be used against COVID-19 and other viruses in the future. Their team views such innovative approaches as a vital hedge against the growing threat of global pandemics. The viral trap works by mimicking the latch points on a human cell that a virus must bind to before infecting a person by disgorging its genetic instructions into the cell. In research on the Dengue virus with Xing Wang, now a professor of chemistry at the University of Illinois, recently published in Nature Chemistry, the team folded a snippet of DNA into a five-pointed star, and attached decoy latch points that align perfectly with the virus’ own molecular grappling hooks. The result was the world’s most sensitive test for Dengue, and a novel means of capturing and ultimately killing the virus. In previous research, the team demonstrated the same approach for Influenza A, and it can likely be expanded to other viruses like COVID-19. In another approach, Dordick demonstrated how enzymes incorporated into paint, can form a catalytic coating capable of killing the Influenza A Virus. The research, published in Applied Microbiology and Biotechnology, suggests enzyme systems could further be incorporated into swabs, wipes, or coatings, to target and kill various viruses, including COVID-19.
