AVBc  AVBP Combustion Computation
 Author : Bénédicte Cuenot, CERFACS
 cuenot@cerfacs.fr
Objectives :
The objective of this project is to compute reacting flows and to
observe propagating flames. The unstructured flower solver
AVBP
of CERFACS is used.
The final goal is the simulation of a flame attached to a bluff body.
Combustion introduces delicate
numerical complexities, and the following steps will be followed:
 Simulation of a onedimensional premixed flame:
conservation equations, initialization, boundary conditions, stability,
influence of the chemistry, etc. In particular the laminar flame speed
will be computed and compared to the theoretical value.
 Simulation of the inert flow around a bluff body:
After defining the geometry, a mesh will be generated and the cold flow calculated.
Particular attention will be put on the influence of the boundary
conditions and the pressure control.
 Simulation of a flame developing behind a bluff body:
An initialisation procedure will have to be defined. Again particular
attention will be put on boundary conditions. The influence of the
chemical parameters
will be studied and used to define different regimes.
Working plan :
 AVBc.1 : Introduction to the AVBP flow solver, execution of a simple
test case.
 AVBc.2 : Onedimensional flame calculation.
 AVBc.3 : Twodimensional cold flow calculation.
 AVBc.4 : Simulation of a flame developing behind a bluff body.
Week 
1 
2 
3 
4 
5 
6 
AVBc.1 
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AVBc.2 

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AVBc.3 


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AVBc.4 




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Exam 





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Deliverables :
 1. Laminar flame speed.
 2. Pressure and velocity fields.
 3. Temperature and velocity fields, reaction rate contours. Comparison with the onedimensional flame.
Bibliography :
 [1] The AVBP User's Manual, T. Schönfeld, CERFACS, 1999.
 [2] Cours de FORTRAN77/90.
Pedagogical interest :
Introduction to some CFD problems of reacting flows, getting familiar
with unstructured data format.
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