CFD relatedResearch & Development

at the

DEPARTMENT of FLUID MECHANICS

Budapest University of Technology and EconomicsHUNGARY

Prof. Tamás LAJOS Dr. Gergely KRISTÓF

Dr. János VAD

Fluid Mechanics Community Meeting, TU WIEN, September 30th 2004

Radial pump simulation:comparison of simulated flow field and PIV data

PIV measurement

FLUENT simulation

Fluid Mechanics Community Meeting, TU WIEN, September 30th 2004

Cavitation zone

Hydraulic losses

Optimization ofside-channel fuel pump of cars

Pressure distribution

φ=0.64 φ=0

Fluid Mechanics Community Meeting, TU WIEN, September 30th 2004

Simulation of exhaust system: nonuniform load of catalitic converter

Fluid Mechanics Community Meeting, TU WIEN, September 30th 2004

Vehicle AerodynamicsPressure coefficient distribution about rotating isolated wheel

-2

-1.5

-1

-0.5

0

0.5

1

1.5

2

2.5

0 30 60 90 120 150 180 210 240 270 300 330 360

fi [°]

Cp

[-]

Experiment-Fackrell

Experiment-Skea

Experiment-MIRA

CFD-Author's

CFD-Fackrell

Flow topology and validation on isolated wheel

Flow topology in wheelhouse, interaction of flow inside wheelhouse and vehicle body

Fluid Mechanics Community Meeting, TU WIEN, September 30th 2004

Measurement and numerical simulation of pollutant dispersion in urban atmosphere

Numerical and wind tunnel model of Millennium City Center

Pollutant concentration

Mean concentration valueslogarithmic scale

0.1

1

10

100

R1 R3 R5 R7 R9 R11 R13 R15 U1 U3 U5 U7

measuring points

c*

Wind Tunnel

MISKAM 4.21

FLUENT 6

Comparison of simulation and measurement

Fluid Mechanics Community Meeting, TU WIEN, September 30th 2004

Numerical simulation and wind tunnel measurement of wind forces

X

Y

Z

Cp MEAS0.750.680.610.550.480.410.340.280.210.140.070.01

-0.06-0.13-0.20-0.26-0.33-0.40-0.47-0.53

Measured in wind-tunnel FLUENT 5.5

Budapest Arena

D ru ck beiwerte an äu sserer O berfläch e ( C pa [- ] )W in dr ich tu n g 0° 1:300

0°

Bild 6.

Ice-stadium Essen

Fluid Mechanics Community Meeting, TU WIEN, September 30th 2004

Air-conditioning & ventilation of large halls

Streamlines and temperaturein a concert hall

Flow in aula of a bank

Streamlines in Opera-house Temperature in Sport Arena

Smoke dispersionin Sport Arena

Fluid Mechanics Community Meeting, TU WIEN, September 30th 2004

Application of CFD in energetics

NOx reduction in boiler

Simulation of flowin steam turbine stage

Optimization of flow in boilers

Fluid Mechanics Community Meeting, TU WIEN, September 30th 2004

Coherent structure extraction

PIV measurements on a flow over a rectangular, open cavity

Extraction of coherent structures from turbulent flows by Proper Orthogonal Decomposition (POD)

Flow direction Flow direction

Coherent structures, which characterize temporal features (energetic vortex shedding process found by POD)

Fluid Mechanics Community Meeting, TU WIEN, September 30th 2004

LES of flow past a Danube bridge:comparison of simulation and wind tunnel results,fluctuation of lift force

Fluid Mechanics Community Meeting, TU WIEN, September 30th 2004

Description of turbulent ribbed duct flow, using results of Large Eddy SimulationApplication: internal

cooling of turbine blades

Mixing by the mean flow

Mesh, recirculation regions

High TKE regionValidation to PIV measurement

Fluid Mechanics Community Meeting, TU WIEN, September 30th 2004

Conference on

ModellingFluid Flow

Conference Proceedings

of the previous CMFF’03in Vol.I-II.

J. Vad, T. Lajos, R. Schilling (Eds.)Modelling Fluid Flow / The State of the Art-invited lectures-summaries of workshops-selected papersSPRINGER Verlag 2004 ISBN 3-540-22031-3

Fluid Mechanics Community Meeting, TU WIEN, September 30th 2004

BUDAPEST / HUNGARY

NEXT CMFFEVENT

in

2006

Organized byDepartment of Fluid Mechanics170 papers from 30 countries

September 3-6, 2003