|April 4, 2014, 03:07||
A UDF of Chemical Recation
Join Date: Apr 2014
Posts: 2Rep Power: 0
I'm learning about the UDF of chemical recation recently and faced several problems, can anyone help me to solve them?
1.I'm trying to make a UDF of methanation using Xu & Froment equation ("Methane Steam Reforming, Methanation and Water-Gas Shift:I.Intrinsic
Kinetics"). And the reaction is conducted in a gas-solid fluidized bed. My question is about unit convertion. The unit of Xu & Froment
equation(kgmol/kgcatalyst/hr) is different from that of the DEFINE_VR_RATE macro in Fluent UDF(kgmol/m^3/s). How can I convert the unit?
2.I found an example of making a UDF of chemical recation which is also conducted in a fluidized bed. The reaction is O3==>1.5O2 and the UDF of
this example is as fallow:
*rr = (1.-C_VOF(c,t))*1.57*C_R(c,t)*yi/mw;
I think (1.-C_VOF(c,t)) is the solid volume fration in the fluidized bed. My question is why multiply by (1.-C_VOF(c,t)) in *rr equation.
I will be appreciated if anyone can help me......
Thanks a LOT!
Last edited by LiJG; April 4, 2014 at 07:20.
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