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Old   December 28, 2007, 04:28
Default Biomass Gasifier
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N K Ram
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Dear All,

I intend to simulate a down draft biomass gasifier considering it as a porous bed. I would also like to get the pressure drop & temperature across the bed. I would also like to know the gas composition, CV and the temperature of the gas at the outlet.

I could model the cold porous bed and get the pressure drop and velocity profiles in the reactor. Further help me out to initiate the chemical reactions.

Kindly help me out; your inputs are highly valuable to me.

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Old   April 1, 2011, 03:52
Default CFD modelling of downdraft gasifier
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Keran.kp
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To, N K Ram

I am Keran patel from Ahmedabad,Studying M tech in Thermal Engg.I've ur thesis of M Tech. which u submitted in 2006-08 under the guidence of Dr. S Maji and Dr. B .B. Arora..

My Project is similiar to urs with a l'ii bit change in model.Bt i can not initiate the combustioin in my model.I kindly request u to help me out.My settings of the model are as below:-

Settings :

Solver -Pressure Based
Formulation -implicit

Space -2D
Velocity Formulation -Absolute
Gradient Option -Green-Gauss Cell Based
Porous Formulation -Superficial Velocity
Multiphase
Multiphase Model : Off
Number of phase -1

Energy
-Energy Equation


Viscous Model
Model -k-epsilon (2 eqn)
k-epsilon Model -Realizable
Near-Wall Treatment -Standard Wall Functions
k-epsilon Multiphase Model -Mixture
Model Constants
C2-Epsilon: 1.9, TKE Prandtl Number: 1, TDR Prandtl Number: 1.2, Disperion Prandtl number: 0.75, Energy Prandtl Number: 0.85, Turb. Schmidt Number: 0.7,

Species Model
Model -Species Transport

Reactions -Volumetric & Particle Surface
Options -Inlet Diffusion & Diffusion Energy Source
Turbulent -Chemistry Interaction -Finite-Rate/Eddy-Dissipation


Operating Condition
Pressure: Operating Pressure(pascal)-101325

Gravity: Gravity- Off


Hope for the Help !

Thanks in advance
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