CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > FLUENT

Wood gaisfication simulation in fluent

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Display Modes
Old   February 23, 2010, 10:39
Default Wood gaisfication simulation in fluent
  #1
New Member
 
dinesh
Join Date: Feb 2010
Posts: 2
Rep Power: 0
dineshbabumg is on a distinguished road
I am b.tech mechanical student studying at vit. iam doing my final year project. iam simulating wood gasification in fluent. could any of you guys tell me how to proceed as iam new to this software.
dineshbabumg is offline   Reply With Quote

Old   February 23, 2010, 19:47
Default
  #2
Member
 
chétan
Join Date: May 2009
Location: Australia
Posts: 55
Rep Power: 7
coalgas is on a distinguished road
Hello Dinesh,

Wood Gasification is interesting area for modelling. To proceed any further do read paper on same area by Di Blasi (2004) in AICHE journal. Secondly, sincere advice is estimate time available for you in your Undergrad Project, and plan accordingly.
There are several approaches to carry out Gasification modelling. One can study surface reactions over surface of wood (if you have decent reaction mechanism), or Porous Media approach where wood block assumed to be porous in nature, or by defining wood and gasifying medium in multiphase model. (Euler Granular model with species transport works fine with Solid - Gas reactions).
I strongly recommend that study the physics of your problem it first.

regards
Chetan
coalgas is offline   Reply With Quote

Old   February 24, 2010, 00:37
Default
  #3
New Member
 
dinesh
Join Date: Feb 2010
Posts: 2
Rep Power: 0
dineshbabumg is on a distinguished road
Thanks chetan for your valuable advice.
i have only two months left; i.e march and april
actually i did study fluent tutorials and carried out simulations, but results are very poor

Slover
Slover -Pressure Based
Formulation -implicit
Space -2D
Velocity Formulation -Absolute
Gradient Option -Green-Gauss Cell Based
Porous Formulation -Superficial Velocity
Multiphase
Multiphase Model - off
Energy -Energy Equation
Viscous Model
Model -k-epsilon (2 eqn)
k-epsilon Model -standard
Near-Wall Treatment -Standard Wall Functions
Species Model
Model -Species Transport
Reactions -Volumetric & Particle Surface
Options -Inlet Diffusion & Diffusion Energy Source
Turbulent -Chemistry Interaction -Finite-Rate/Eddy-Dissipation
Discrete phase model
interaction with continuous phase
number of continuous phase iterations per dpm iteration - 40
tracking parameters max no.of steps - 10000
length scale - 0.01m
drag law - spherical
Operation Condition
Pressure: Operating Pressure(pascal)-101325
Gravity: Gravity- Gravitational Acceleration Z(m/s2)=-9.8
Boussinesq Parameters: Operating Temperature (k)=288.16

i have specified 7 equations in the reactions tab, for wood-volatiles- air mixture properties
the first one is a default one
2. C + O2 = CO2
3. H2 + 1/2O2 = H2O
4. C + H2O = H2 + CO
5. CO2 + C = 2CO
6. CO + H2O = CO2 + H2
7. C + 2H2 = CH4
i have specified pre-exponential factor value: 1.3e+08
activation energy:140300 J/kgmol
are these values very small, or is there any method experimentally or analytically to determine these values for my wood material

please tell me if iam approaching the problem correctly
please do send me your email so that i could discuss the problem more elaborately.

regards,
Dinesh Babu
dineshbabumg is offline   Reply With Quote

Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
3D Simulation of the Plasma Jet in FLUENT Steve FLUENT 9 April 20, 2012 06:42
Submarged body simulation in Fluent 6.3.26 Behnam FLUENT 0 April 22, 2009 06:10
IC engine simulation tutorial by FLUENT yash Main CFD Forum 1 April 21, 2009 05:05
Can Fluent start a simulation from a negative time Ted Chu FLUENT 10 November 26, 2008 22:06
Convert existing Star-CD simulation to FLUENT Lam FLUENT 3 June 10, 2003 12:00


All times are GMT -4. The time now is 03:15.