�Թ���

Harris at the Phononics 2023 conference in��
Manchester, England.

Adam Harris is advancing the frontiers of aerodynamics as a non-traditional student, finishing up a doctoral program in which he never expected to enroll.��

“I’m writing computational fluid dynamics and finite element codes to study flow control by phononic materials and structures. A phonon is the quantum of vibrational energy, a quasi-particle that could give birth to a whole new species of technology,” Harris said.

A PhD student in the materials science and engineering program, Harris began his college journey in 2012 as a psychology major, but his time at CU Boulder did not last long.

“I didn’t show up to classes and just really didn't care. I was placed on academic probation my first semester and academic suspension my second,” Harris said.

A native of Miami, he elected to stay in Boulder, working in construction and landscaping. In 2014, Harris enrolled at Front Range Community College for an associate’s degree in business.

Skydiving Hobby

Harris also started skydiving as a hobby, hanging out at Vance Brand Airport in Longmont, making up to 10 jumps a day. Eventually, he was hired there for a paid ground crew position.

“I was surrounded by people who were monitoring weather, maintaining aircraft, and discussing flight mechanics. I started teaching myself basic aerodynamics, watching TED talks and physics documentaries online. It all became more and more interesting to me,” he said.

After finishing at Front Range, Harris decided to continue onto a four-year business degree at CU Boulder. Because of his past suspension, enrolling required an appointment with an admissions advisor. The meeting would change the direction of his life.

Changing Gears

“I told her about all the science, engineering, and physics I was being exposed to. She looked at me suspiciously and said, ‘Are you sure you want to study business?’ Nope, put me down for physics,” Harris said.

He steamrolled through his courses, earning As and Bs in subjects where he had previously shown little interest. In the five years since his first stint at CU Boulder, Harris had grown significantly.

“Turns out I really love math. I think my success was a product of motivation and how much I enjoyed where I was, the people around me, what I was learning, and relevance to my passions. I have a GPS in my skydiving helmet and I would always try to connect course concepts to data acquired from wingsuit flights,” he said.

As he was completing his bachelor’s, a connection with Mahmoud Hussein, a professor in the Ann and H.J. Smead Department of Aerospace Engineering Sciences, opened the door to graduate school.

Graduate School

“I was still enjoying classes but I paid for undergrad myself, so I didn’t want to continue accumulating debt. I started talking to Mahmoud, and when I learned engineering PhD programs cover tuition and living expenses, there was no question. What an opportunity,” Harris said.

Hussein became his graduate advisor as Harris earned two master’s degrees – in aerospace and materials science. He expects to finish his PhD in materials science next spring.

His dissertation is centered on phononic subsurfaces (PSubs), which could lead to radical increases in fuel economy for jet aircraft and hypersonic vehicles. It has been a focus of Hussein’s lab for 15 years, beginning at the theoretical level and now approaching the applied stage, thanks in part to a major Office of Naval Research grant awarded last year.

“This started with purely computational work and now we’re 3D printing PSubs. We can validate the PSub’s tuned frequency response with a laser vibrometer, and we have candidate prototypes that yield the response we expect. We’re going to begin the first wind tunnel tests in collaboration with the Experimental Aerodynamics Laboratory at CU Boulder very soon,” Harris said.

What's Next?

As he writes his dissertation, Harris’s research background offers a wealth of career opportunities, but he is hoping for a particular dream job that would combine fluid dynamics and computational modeling with his love of skydiving.

It may sound like a fantasy. It is not.

“There’s a company in California that builds parachutes used for space craft atmospheric re-entry,” Harris said. “The job description is everything I’m doing at CU Boulder, plus a requirement of parachute rigging experience, which I have.”

Wherever Harris lands, he is a long way from his beginnings in Boulder as an 18-year-old psych major.

“I think this is where I was supposed to be all along,” Harris said. “I just wasn’t aware of it back then. The synchronicity is really cool.”

��

Additional Photos

Harris BASE jumping in La Mousse, Switzerland.

Gliding into a canyon

Harris skydiving over Vance Brand Airport in Longmont.