Natural convection in the spent fuel pool
Hi everyone,
I have question. I'm trying to simulate natural convection in the spent fuel pool. For example I have a box which dimensions is: lenght and width 6,0 m, height 11,0 m. Setup in Fluent 14.0 is: General: Solver - pressure-based Time - steady Gravity - Z axis -9.81 Models: Energy - ON Viscous - Standart k-e, Standart Wall Fn Materials: Fluid: water (boussinesq model 998,2 density; Cp 4182; Thermal Conductivity 0,6; Viscousity 0.001003; Thermal expansion coefficient 0,0002) Cell Zone Conditions -> Edit -> Material name - water-liquid Boundary Conditions (to types of wall: one wall heat - temperature 500K; others walls are only convection (Heat transfer coef. 2.5; Free stream temperature 293); OPERATING COUNDITIONS: operating pressure 101325 Pa, operating temperature 301K. Solution methods: Scheme - simple; Gradient - Least Squares Cell Based; Pressure - Body force weighted; Momentum, Turbulent Kinetic Energy, Turbulent dissipation rate, energy is first order upwind Solution Initialization - hybryd initialization Run calculation - 1000 iterations First question is - thats wrong with pressure? In the bottom of pool preassure should be about 2 bar. Second queastion is - what way the water can be heated uo to 226 K (Water boiling near 2 bar pressure is about 110-120 Celsius and water can't be the biger temperature than ~110-120 Celsius? Thank You! https://scontent-fra.xx.fbcdn.net/hp...74&oe=55D0F642 https://scontent-fra.xx.fbcdn.net/hp...1b&oe=55D3FAE9 https://scontent-fra.xx.fbcdn.net/hp...60&oe=559A92B8 |
Please, help...
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(I am not a expert but) Problem what I can see it your meshing zixe ? Such a large system, you need a massive computer to even create Meshing and months to process the modelling. Good Luck Shane |
Dear Sircop,
I have a very powerful compute cluster, so the mesh for my pool is about 30 million cels. Now my model looks like this: https://scontent-fra3-1.xx.fbcdn.net...15&oe=55F6926B My model is closed domain, so there is not the inlet and outlet pipes and the preasure in the operational conditions are selected like this: https://scontent-fra3-1.xx.fbcdn.net...30&oe=562B2CE1 By the way, maybe You have Forced Convection Cooling or Pre-pressurized tank tutorials? Kind regards, Audrius |
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