Computational Fluid Dynamics

SEMINAR I(introduction)

What is CFD

Applications of CFD

CFD research at AUB

CFD Tutorial

Plan

Maturing technology

adopted by increasing number of industries

still require expert users

An Expanding CFD Community

research and development

applications

Why CFD Seminars?

CFD Advantages

Research tool

Exploration of flow physics

Design Tool

Simulation based design rather than build and test

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.

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 eye following laser heating.

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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How Does CFD WorkGoverning Equation

as a system ofPartial Differential

Equations

System of Algebraic Equations

Numerical Solutions

Discretization Method

Finite DifferenceFinite VolumeFinite Element

Boundary Element

Solution Method

Combinations ofMultigrid MethodsIterative Solvers

Coupled-Uncoupled techniques

Geometric Discretization

Structured GridsCartesian, Non-Orthogonal)

Block Structured gridsUnstructured Grids

Chimera Grids

Geometric Discretization

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Geometric Discretization

Structured GridsCartesian, Non-Orthogonal)

Block Structured gridsUnstructured Grids

Chimera Grids

Equation Discretization

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F3

F2

Neighbor 1 Cells

Neighbor 2 Cells€

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Γ∇φ( ) ⋅ dS∂Ω

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Γ∇φ( ) f ⋅S ff (∂Ω)∑

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Discretization Method

Finite DifferenceFinite VolumeFinite Element

Boundary Element

Solving the Algebraic Equations

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

High Performance Parallel Computing

Demo

Fluent/Gambit

Free-SurfaceDEMO