--- title: Multiphase turbulence mechanisms identification from consistent analysis of direct numerical simulation data description: DNS analysis reveals the impact of bubble deformability on turbulence, guiding the development of models for multiphase flow in nuclear reactors. image: https://canes.mit.edu/hubfs/MIT_Museum_TeamPic_0.jpg --- [![CAnes logo\[96\]](https://canes.mit.edu/hs-fs/hubfs/CAnes%20logo%5B96%5D.png?width=300&height=91&name=CAnes%20logo%5B96%5D.png "CAnes logo[96]")](https://canes.mit.edu/) [![canes](https://canes.mit.edu/hs-fs/hubfs/canes.png?width=300&height=91&name=canes.png "canes")](https://canes.mit.edu/) [![](https://canes.mit.edu/hs-fs/hubfs/canes.png?width=500&height=152&name=canes.png)](https://canes.mit.edu/) This is a search field with an auto-suggest feature attached. - There are no suggestions because the search field is empty. - [the center](https://canes.mit.edu/center) - [science + engineering](https://canes.mit.edu/science-engineering) - [E+ Lab](https://canes.mit.edu/epluslab) - [publications](https://canes.mit.edu/reports) - [events](https://canes.mit.edu/events) This is a search field with an auto-suggest feature attached. - There are no suggestions because the search field is empty. # Multiphase turbulence mechanisms identification from consistent analysis of direct numerical simulation data by [Emilio Baglietto](https://canes.mit.edu/media/author/emilio-baglietto) | Dec 8, 2020 Direct Numerical Simulation (DNS) serves as an irreplaceable tool to probe the complexities of multiphase flow and identify turbulent mechanisms that elude conventional experimental measurement techniques. The insights unlocked via its careful analysis can be used to guide the formulation and development of turbulence models used in multiphase computational fluid dynamics simulations of nuclear reactor applications. Here, we perform statistical analyses of DNS bubbly flow data generated by Bolotnov (Reτ = 400) and Lu–Tryggvason (Reτ = 150), examining single-point statistics of mean and turbulent liquid properties, turbulent kinetic energy budgets, and two-point correlations in space and time. Deformability of the bubble interface is shown to have a dramatic impact on the liquid turbulent stresses and energy budgets. A reduction in temporal and spatial correlations for the streamwise turbulent stress (uu) is also observed at wall-normal distances of y+ = 15, y/δ = 0.5, and y/δ = 1.0. These observations motivate the need for adaptation of length and time scales for bubble-induced turbulence models and serve as guidelines for future analyses of DNS bubbly flow data. Credits:  Ben Magolan, Emilio Baglietto (MIT), Cameron Brown, Igor A. Bolotnov (NC State), Gretar Tryggvason, Jiacai Luc (Notre Dame) [BACK TO THE CENTER->](https://canes.mit.edu/center) Recent posts [Nuclear Energy Dominance: Can the US do it Alone?](https://canes.mit.edu/media/energy-dominance-can-the-us-do-it-alone) [Assessment of the Lifecycle Cost of Nuclear Grade Coolants for Advanced Reactors](https://canes.mit.edu/media/assessment-of-the-lifecycle-cost-of-nuclear-grade-coolants) [Bilge Yildiz and Jacopo Buongiorno Take Nuclear-Fueled AI to TEDx](https://canes.mit.edu/media/bilge-yildiz-and-jacopo-buongiorno-take-nuclear-fueled-ai-to-tedx) [Levelized Cost of Fuel (LCOF) Studies for Microreactors Using TRISO Fuel in Hydride and Beryllium-based composite Moderators in Open and Closed Fuel Cycles](https://canes.mit.edu/media/a-preliminary-study-on-the-feasibility-of-nuclear-batteries-for-offshore-power-generation-0) [A Preliminary Study on the Feasibility of Nuclear Batteries for Offshore Power Generation](https://canes.mit.edu/media/a-preliminary-study-on-the-feasibility-of-nuclear-batteries-for-offshore-power-generation) [![CAnes logo\[96\]](https://canes.mit.edu/hs-fs/hubfs/CAnes%20logo%5B96%5D.png?width=3300&height=1000&name=CAnes%20logo%5B96%5D.png "CAnes logo[96]")](https://canes.mit.edu/) 77 Massachusetts Avenue, 24-215 Cambridge, MA 02139 [canes@mit.edu](mailto:canes@mit.edu) - [ACCESSIBILITY](https://accessibility.mit.edu/) - [MEDIA](https://canes.mit.edu/center-media) - [CENTER](https://canes.mit.edu/center) - [EVENTS](https://canes.mit.edu/events) - [MAP](http://whereis.mit.edu/?go=24) - [MIT CCSE](https://cse.mit.edu/) - [MIT ENERGY INITIATIVE](https://energy.mit.edu/) - [MIT MECHE](http://meche.mit.edu/) - [MIT NRL](http://nrl.mit.edu/) - [MIT NSE](http://web.mit.edu/nse/) - [MIT PSFC](https://www.psfc.mit.edu/) © 2024 Massachusetts Institute of Technology   |  Privacy Policy