|August 28, 2009, 02:44||
hydraulic diameter in 2d
Join Date: Jul 2009
Posts: 13Rep Power: 8
i am working on a 2D case of the fluidization of charcoal. In order to specify the turbulance specification at velocity inlet, i have to specify the value of hydraulic diameter. In 3d, inlet is a circular duct. Problem is that how i can define the hydraulic diameter for 2D case at velocity inlet edge.
In the tutorial 01 of fluent6.2, i have found that the wetted perimeter will always be 2 for a circular inlet in 2D case regardless of whatever is inlet diameter. Also the hydraulic dimeter will be 2 times the diameter of the circular inelt.
In some other tutorials, i found that the hydraulic diameter will be double of actual diameter for a 2D case.
plz guide me that how this hydraulic dimeter will be double for a 2D case and how this wetted perimeter is 2.
|August 28, 2009, 03:14||
Join Date: Mar 2009
Posts: 133Rep Power: 8
to specify turbulence correctly at inlets using intensity and hydraulic diameter you always have take the actual, physical dimensions. If your inlet geometry is a circle then take its diameter, no matter if you are using a 2-D or 3-d model to simulate the problem.
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