•Computational fluid dynamics
(CFD) is the science of predicting fluid flow, heat and mass transfer, chemical
reactions, and related phenomena by solving numerically the set of governing
mathematical equations
–Conservation of
mass
–Conservation of
momentum
–Conservation of
energy
–Conservation of
species
–Effects of body
forces
–Etc.
•
•The results of CFD analyses
are relevant in:
–Conceptual
studies of new designs
–Detailed product
development
–Troubleshooting
–Redesign
–
•CFD analysis complements
testing and experimentation by reducing total effort and cost required for
experimentation and data acquisition.
•What
results are you looking for (i.e. pressure drop, mass flow rate), and how will
they be used?
–What are your modeling options?
•What physical
models will need to be included in your analysis (i.e. turbulence,
compressibility, radiation)?
•What simplifying
assumptions do you have to make?
•What simplifying
assumptions can you make (i.e. symmetry, periodicity)?
•Do you require a
unique modeling capability?
–User-defined
functions (written in C) in FLUENT or User FORTRAN functions in CFX
•
•What
degree of accuracy is required?
•
•How
quickly do you need the results?
•
Is CFD an appropriate tool?
•How will
you obtain a solid model of the fluid region?
–Make use of existing CAD models?
•Extract the
fluid region from a solid part?
–Create from scratch?
•Can you
simplify the geometry?
–Remove unnecessary features that would complicate meshing
(fillets, bolts…)?
–Make use of symmetry or periodicity?
•Are both the
solution and boundary conditions symmetric / periodic?
•Do you
need to split the model so that boundary conditions or domains can be created?
Get free full Tutorial!
Please send me email:
cadxneter@hotmail.com
No comments:
Post a Comment