Ghadge, Dhanashree2019-01-242019-01-242018-10-302019-01-24Ghadge D., and Chatoorgoon V.. 2018. “Analytical Study of Supercritical Water Flow in Two Heated Parallel Channels with Wall Heat Effect.” In London, UK.http://hdl.handle.net/1993/33729The wall thermal energy storage effects on supercritical thermal hydraulic instability were investigated using a 1D-Linear frequency domain solution and 3D- Non-linear ANSYS CFX solution. Experimental cases of supercritical upward flow in two heated parallel channels were analysed. The one-dimensional (1D) analyses were done with two different wall thicknesses using uniform and non-uniform power distributions. It was found that the inclusion of wall thermal energy storage effects gives better prediction of thermal hydraulic instability in these two heated parallel-channel cases, which contradicts the conclusions of previous studies with wall thermal energy storage effects. Accurate prediction of the period of oscillation was also obtained. The 3D- numerical solution with wall also gives an excellent agreement with the experiments, for the instability boundary. A common CFD assumption; namely, circumferentially symmetric flow, was found to be inadequate. Temporal and grid independence was ensured for the reported cases. The predictions of period of oscillation obtained with the non-linear 3D ANSYS CFX code are discussed. Additionally, non-dimensional parameters were derived for the conversion of experimental data from one fluid to another in a given test facility and validated using 1D- linear solution.engSupercriticalNon dimensional parametersSCWRThermofluidCFDWall heat effectsmaster thesis