CFD Seminar
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Transcript of CFD Seminar
7/30/2019 CFD Seminar
http://slidepdf.com/reader/full/cfd-seminar 1/13
Computational Fluid
DynamicsSEMINAR I(introduction)
7/30/2019 CFD Seminar
http://slidepdf.com/reader/full/cfd-seminar 2/13
What is CFDApplications of CFD
CFD research at AUB
CFD Tutorial
Plan
7/30/2019 CFD Seminar
http://slidepdf.com/reader/full/cfd-seminar 3/13
Maturing technology
adopted by increasing number of industries
still require expert users
An Expanding CFD Community
research and development
applications
Why CFD Seminars?
7/30/2019 CFD Seminar
http://slidepdf.com/reader/full/cfd-seminar 4/13
CFD Advantages
Research tool
Exploration of flow physics
Design Tool
Simulation based design rather than buildand test
7/30/2019 CFD Seminar
http://slidepdf.com/reader/full/cfd-seminar 5/13
CFD Applications
Aerospace
Automotive
Chemical Processing
Power Generation
Wing-Body Interaction
Hypersonic Launch Vehicle
Aerodynamics
Engine Cooling
Polymerization reactor vessel - prediction
of flow separation and residence time
effects.
Shear rate distribution in twin-
screw extruder simulation
Flow in a
burner
Flow pattern through a water turbine.
7/30/2019 CFD Seminar
http://slidepdf.com/reader/full/cfd-seminar 6/13
newer CFD Applications
HVAC
Particle traces of copier VOC emissions
colored by concentration level fall
behind the copier and then circulate
through the room before exiting the
exhaust.
Interior Ventilation
BiomedicalMedtronic Blood Pump
Temperature and natural
convection currents in the
Appliances
Surface-heat-flux plots of the No-Frost refrigerator and
freezer compartments helped BOSCH-SIEMENS engineers to
optimize the location of air inlets.
ConstructionFlow vectors and pressure
distribution on an offshore oil rig
Flow around cooling towers
...
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Microelectronics
7/30/2019 CFD Seminar
http://slidepdf.com/reader/full/cfd-seminar 7/13
How Does CFD WorkGoverning Equation
as a system ofPartial Differential
Equations
System of AlgebraicEquations
Numerical Solutions
Discretization Method
Finite Difference
Finite VolumeFinite ElementBoundary Element
Solution Method
Combinations of
Multigrid MethodsIterative Solvers
Coupled-Uncoupled techniques
Geometric Discretization
Structured GridsCartesian, Non-Orthogonal)
Block Structured gridsUnstructured GridsChimera Grids
7/30/2019 CFD Seminar
http://slidepdf.com/reader/full/cfd-seminar 8/13
Geometric
Discretization
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Geometric Discretization
Structured GridsCartesian, Non-Orthogonal)
Block Structured gridsUnstructured GridsChimera Grids
7/30/2019 CFD Seminar
http://slidepdf.com/reader/full/cfd-seminar 9/13
Equation Discretization
P
F1
F4
F3
F2
Neighbor 1 Cells
Neighbor 2 Cells
∂ ρφ ( )∂t
+ ∇ ⋅ ρ vφ ( ) = ∇ ⋅ Γ ∇φ ( )+ S φ
∇ ⋅ Γ ∇φ ( )d ΩΩ
∫∫
Γ∇φ ( ) ⋅ d S
∂Ω
∫
Γ∇φ ( ) f ⋅ S f
f (∂Ω)
∑
P F
f
dPF
Sf
∇φ ( ) f =
φ N −φ P
PN + ...
Discretization Method
Finite DifferenceFinite VolumeFinite Element
Boundary Element
7/30/2019 CFD Seminar
http://slidepdf.com/reader/full/cfd-seminar 10/13
Solving the Algebraic
Equations
7/30/2019 CFD Seminar
http://slidepdf.com/reader/full/cfd-seminar 11/13
CFD Research at AUB
Started in early 1990’s
Development in many key areas
accuracy enhancement
robust algorithms
complex physics
http://webfea.fea.aub.edu.lb/fea/me/CFD
7/30/2019 CFD Seminar
http://slidepdf.com/reader/full/cfd-seminar 12/13
High Performance
Parallel Computing
Demo
7/30/2019 CFD Seminar
http://slidepdf.com/reader/full/cfd-seminar 13/13
Fluent/Gambit
Free-SurfaceDEMO