Christopher A. Roseman

Chris Roseman received his PhD in Aerospace Engineering Sciences from The University of Colorado Boulder in August of 2022. He also received a Master’s degree in Aerospace Engineering from CU Boulder and a Bachelor’s degree in Mechanical Engineering from Bradley University. Chris began working at NSI as a Postdoctoral Research Associate in January 2023. He transitioned to a Research Associate in March 2025. His research involves the modeling and simulation of high-speed vehicles from the continuum to free-molecular regimes. He seeks to leverage state-of-the-art computational methods to advance the design and development of high-speed vehicle systems.

Rarefied Gas Dynamics – Low-orbit satellites and reentry vehicles encounter the low-density upper atmosphere. Accurately predicting drag, heat transfer, and chemical processes for these vehicles requires a molecular simulation approach. The direct simulation Monte Carlo (DSMC) method accurately models these rarefied flows. Chris helps maintain the MONACO DSMC code and uses it to simulate satellite drag and air-breathing propulsion systems. His graduate research work also used DSMC to simulate the heat transfer from low-speed fine-wire measurement systems. Chris has also taught a graduate level on molecular gas dynamics and the DSMC method.

Radiation Signature Modeling – Strong shocks form in front of hypersonic vehicles. These strong shocks cause high temperatures, molecule dissociation, and ionization. Excited molecules and atoms in the post-shock region radiate in both the ultraviolet and infrared wavelength bands. Predicting the radiation coming from the gas around a hypersonic vehicle is important for understanding how to detect and track these emerging threats. Chris uses non-equilibrium CFD simulations and a radiation transport solver to predict the radiation signature from hypersonic vehicles.