convergence problem for gas-solid fluidized bed with EE method

nancyjia · November 24, 2015, 08:18

Hello everyone,

I am simulating a fluidized bed in 3D using Fluent. I have convergence problem with the v-solid parameter. I have tried changing URF, time step, drag laws, meshing but it still diverges after around 20 time steps. I want to ask does anyone know why it is like that or am I missing something here ? Many thanks.

hwet · December 7, 2015, 03:35

can be due to a gazillion problem, you will have to give more setup/geometry/physics details.

nancyjia · December 7, 2015, 06:31

Thank you for your answer. My set up is air blowing solid particles of 1mm diameter in a rectangular fluidized bed (64*8*200mm)

November 24, 2015, 08:18	convergence problem for gas-solid fluidized bed with EE method	#1
nancyjia New Member xue mei Join Date: Nov 2015 Posts: 2 Rep Power: 0	Hello everyone, I am simulating a fluidized bed in 3D using Fluent. I have convergence problem with the v-solid parameter. I have tried changing URF, time step, drag laws, meshing but it still diverges after around 20 time steps. I want to ask does anyone know why it is like that or am I missing something here ? Many thanks.

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December 7, 2015, 03:35		#2
hwet Senior Member Join Date: Mar 2014 Posts: 375 Rep Power: 13	can be due to a gazillion problem, you will have to give more setup/geometry/physics details.

December 7, 2015, 06:31		#3
nancyjia New Member xue mei Join Date: Nov 2015 Posts: 2 Rep Power: 0	Thank you for your answer. My set up is air blowing solid particles of 1mm diameter in a rectangular fluidized bed (648200mm)