A team of Army researchers developed a new gel-propellant engine called the vortex engine. Michael Nusca, Ph.D., Robert Michaels and Nathan Mathis were recently recognized by the Department of the Army with a 2012 Army Research and Development Outstanding Collaboration Award for their work titled, "Use of Computational Fluid Dynamics in the Development and Testing of Controllable Thrust Gel Bipropellant Rocket Engines for Tactical Missiles."

United States Army Article