Print Email Facebook Twitter Algebraic heat flux modeling for numerical prediction of heat transfer and flow in Natural Convection Title Algebraic heat flux modeling for numerical prediction of heat transfer and flow in Natural Convection Author Kanawade, Kunal (TU Delft Aerospace Engineering) Contributor Gerritsma, M.I. (mentor) Shams, Afaque (graduation committee) Degree granting institution Delft University of Technology Programme Aerospace Engineering Date 2019-12-19 Abstract In nuclear industry applications, from design and safety aspects, it is important to predict the flow and heat transfer. The passive cooling systems, one of the robust cooling systems in the nuclear design are based on natural convections. In the RANS approach, non-linear unknown heat flux term has to be closed by appropriate model for accurate predictions of flow and thermal fields. This thesis presents a numerical framework for simulating heat and flow transfer in natural convection flow regimes by employing algebraic turbulent heat flux model AHFM-NRG+, coupled with second order turbulence model. The turbulent heat flux model coefficients are calibrated and a correlation between Rayleigh and Prandtl numbers with model coefficient is defined. The model is employed for different test cases of Rayleigh Bénard convections and is validated by comparing the simulation results with reference DNS data. Subject turbulent heat fluxNatural connectionheat transferreynolds stress modelNumerical modeling To reference this document use: http://resolver.tudelft.nl/uuid:2c68d396-1b81-41e7-aa7a-f57e674dc059 Embargo date 2021-12-31 Part of collection Student theses Document type master thesis Rights © 2019 Kunal Kanawade Files PDF Kunal_thesis_report1.pdf 2.28 MB Close viewer /islandora/object/uuid:2c68d396-1b81-41e7-aa7a-f57e674dc059/datastream/OBJ/view