Images

Here are some selected experiments/simulation images. If you want to contribute to this section, please contact us.

High Fidelity LES/DNS to fundamental study

High fidelity DNS are performed using CHAPSim1.0 to simulate the flow of water at a supercritical pressure between two vertical parallel plates with heating/cooling on the two walls to study the ‘direct effect of buoyancy’ and strong variations of thermal properties. From left to right, there are isosurfaces of turbulence structures of isothermal flow, flow with forced convection at a heated wall temperature just below pseudo-critical temperature, mixed convection at a heated wall temperature just below pseudo-critical temperature, flow with forced convection at a heated wall temperature just above pseudo-critical temperature, mixed convection at a heated wall temperature just above pseudo-critical temperature and the case configuration. Credit: Wei Wang (Daresbury Laboratory, STFC, UKRI, UK)
High fidelity DNS are performed using CHAPSim1.0 to simulate the flow of water at a supercritical pressure between two horizontal parallel plates with heating top wall and cooling bottom wall to study the effect of buoyancy and strong variations of thermal properties on turbulence stably stratification. The figure shows the spanwise-vorticity fluctuation of isothermal flow (top row right), flow with forced convection at a heated wall temperature just below pseudo-critical temperature (middle row left), mixed convection at a heated wall temperature just below pseudo-critical temperature (middle row right), flow with forced convection at a heated wall temperature just above pseudo-critical temperature (bottom row left), mixed convection at a heated wall temperature just above pseudo-critical temperature (bottom row right) and the case configuration (top row left). Credit: Wei Wang (Daresbury Laboratory, STFC, UKRI, UK)
High fidelity DNS of CO2 at a supercritical pressure in an upward heated flow
Turbulent streaks and vortical structures in an upward heated flow of supercritical carbon dioxide (with the Boussinesq approximation applied, Re=5234). Credit: Jundi He (University of Sheffield, UK)
Vortical structures in four heated pipe flows of supercritical fluids (CO2 at 8.57MPa, H2O at 25MPa, NH3 at 12.63MPa, R23 at 5.7MPa) at Re=5234. Credit: Jundi He (University of Sheffield, UK)

Code-to-code coupling and multiscale/multiphysics modelling

A coupled simulation between SubChCFD and resolved CFD with the porous media method for a 5-metre long 5x5 rod bundle with spacers. Credit: Bo Liu (University of Sheffield, UK)

Couple fluid dynamic and neutronics codes modelling of corrosion in MoltenSalt Fast Reactors. Credit: Greg Cartland-Glover (STFC, UKRI, UK)

Screenshot 2021-05-17 at 16.29.57

Conjugate heat transfer and wall thermal stress investigations in a U-bend using code-code coupling. The CFD solver is Code_Saturne5.0. The structure solver is FEniCSv2019.1.0. The coupling interface is MUI. Credit: Wendi Liu (STFC, UKRI, UK)