SHARP: Simulation-Based High-Efficiency Advanced Reactor Prototyping

Publications

• Petascale Algorithms for Reactor Hydrodynamics, Paul Fischer, James Lottes, David Pointer, and Andrew Siegel J. Phys. Conf. Series (2008).

• Large Eddy Simulation of Wire-Wrapped Fuel Pins I: Hydrodynamics in a Periodic Array , P. Fischer, J. Lottes, A. Siegel, G. Palmiotti, 2007.
  

Images

Isosurface of velocity magnitude of flow in subassembly comprising 19 wire-wrapped pins, computed on a 4096-processor IBM BG/P at Argonne's Leadership Computing Facility. Pressure is mapped onto the velocity isosurface. Peak axial flow distributions are consistently found on the leeward side of the wire.





Velocity distribution in a 7-pin wire-wrapped fuel assembly simulated on 2048 nodes of Argonne's IBM BGL platform using the spectral element code Nek5000. The velocity magnitude is nondimensionalized by the mean axial flow speed, U=1. Image generated by D. Brenner (LLNL) with VisIt.





Iso-surface of axial-velocity at u = 0.65 U for Re~10,000. The isosurface clearly reveals the presence of turbulence-induced low-speed streaks reaching from the boundary-layer into the bulk flow domain. (The axial velocity component points in the direction of the pin.)





Temperature variation for turbulent flow around a wire-wrapped fuel pin in an advanced recycling reactor. Red is hot, blue is relatively cold.





Axial velocity distribution in a 7-pin wire-wrapped fuel assembly simulated on 2048 nodes of Argonne's IBM BGL platform using the spectral element code Nek5000. Wire wraps helically in a counter-clockwise diretion coming out of the page.