@article{brown_shaver_lahey_bolotnov_2017, title={Wall-resolved spectral cascade-transport turbulence model}, volume={320}, ISSN={["1872-759X"]}, DOI={10.1016/j.nucengdes.2017.06.001}, abstractNote={A spectral cascade-transport model has been developed and applied to turbulent channel flows (Reτ = 550, 950, and 2000 based on friction velocity, uτ; or Reδ = 8500; 14,800 and 31,000, based on the mean velocity and channel half-width). This model is an extension of a spectral model previously developed for homogeneous single and two-phase decay of isotropic turbulence and uniform shear flows; and a spectral turbulence model for wall-bounded flows without resolving the boundary layer. Data from direct numerical simulation (DNS) of turbulent channel flow was used to help develop this model and to assess its performance in the 1D direction across the channel width. The resultant spectral model is capable of predicting the mean velocity, turbulent kinetic energy and energy spectrum distributions for single-phase wall-bounded flows all the way to the wall, where the model source terms have been developed to account for the wall influence. The model has been implemented into the 3D multiphase CFD code NPHASE-CMFD and the latest results are within reasonable error of the 1D predictions.}, journal={NUCLEAR ENGINEERING AND DESIGN}, author={Brown, C. S. and Shaver, D. R. and Lahey, R. T., Jr. and Bolotnov, I. A.}, year={2017}, month={Aug}, pages={309–324} }
 @article{brown_zhang_kucukboyaci_sung_2016, title={Best estimate plus uncertainty analysis of departure from nucleate boiling limiting case with CASL core simulator VERA-CS in response to PWR main steam line break event}, volume={309}, journal={Nuclear Engineering and Design}, author={Brown, C. S. and Zhang, H. and Kucukboyaci, V. and Sung, Y.}, year={2016}, pages={8–22} }
 @article{brown_bolotnov_2016, title={Spectral Analysis of Single- and Two-Phase Bubbly DNS in Different Geometries}, volume={184}, ISSN={["1943-748X"]}, DOI={10.13182/nse15-126}, abstractNote={Abstract The spectral analysis of turbulent single- and two-phase direct numerical simulation (DNS) data in flat plane channel, circular pipe, and reactor subchannel geometries is performed using the recorded DNS velocity fluctuations as a function of time and applying the fast Fourier transform. This results in an energy spectrum of the liquid turbulence in a frequency domain. The complexity of multiphase flow results in a mixed velocity time history coming from either the liquid or the gas phase. A modified single-phase signal that mimics the presence of bubbles (“pseudo-void”) is developed to quantify the effect of the liquid signal intermittency as the bubble passes through a virtual probe. Comparisons of single-phase, pseudo-void, and two-phase results quantify the changes to the expected #x2013;5/3 slope of the energy spectrum for single-phase flows due to turbulent interactions caused by the wakes behind a bubble. The two-phase energy spectra show a slope close to #x2013;3 and similar shape in the different geometries while single-phase energy spectra exhibit the expected #x2013;5/3 slope. Pseudo-void results indicate that the change to the energy spectrum in bubbly two-phase flows is due entirely from liquid turbulence interactions with the bubble wakes. A comprehensive spectral analysis for different geometries and different Reynolds number flows at varying distances from the wall is an essential step in developing physically sound closure models for bubble-liquid interactions. The comparison between different geometries demonstrates the direct applicability of various models to reactor-relevant geometries.}, number={3}, journal={NUCLEAR SCIENCE AND ENGINEERING}, author={Brown, C. S. and Bolotnov, I. A.}, year={2016}, month={Nov}, pages={363–376} }
 @article{brown_zhang_2016, title={Uncertainty quantification and sensitivity analysis with CASL Core Simulator VERA-CS}, volume={95}, journal={Annals of Nuclear Energy}, author={Brown, C. S. and Zhang, H. B.}, year={2016}, pages={188–201} }