Investigating Ship Wakes and Wave Patterns
Clarifying Questions
●
What did you take as the
“Speed of Water”
?
●
Do you think this
speed of water
is
constant
or does it
depend
on some
kind of parameter?
●
The envelope line of the
Mach cone
is created by the boundary of
air and
created vacuum
, but the shape of the Ship wake is created by the
boundary of water and water. Did you consider that, and do you think that
can affect your theory?
●
Sound waves are created by difference in pressure of air, however water is
incompressible
. So what is the
main
difference in the pattern of the wake
from the Mach cone?
●
●
Are these the
full formulas
for water
dispersion relations
?
●
Do you think that the
gravity waves
model holds of
all sizes and speeds
of
ships?
●
Your dispersion relations
assume deep waters
, but in your experiments is
it so?
6.
Ship Wakes:
Opposition
Opponent: Petar Petrov
Slidesgo
2022
Slidesgo School
6. Ship Wakes
The
wave pattern
produced by a ship
moving on the water
is
visually
similar
to a
Mach cone
and depends on
various
parameters
. Investigate the effect.
Theory
•
Many wave equations and
explanation of simple waves
•
Mention Dispersion
•
Wrong explanation of the effect
•
Should not use Mach angle
aproximation
•
No Explanation of the effect of
dispersion in ship wakes
•
Mention a constant
Experiment
•
Include different velocities of the
boat
•
Different lenghts of the boats
•
No taking into account the length of
the boats
•
No explanation of the considered
constant wavelengths
Results
•
Claculated errror
•
Fitted the experimental data with a
model
•
Correlation between theory and
experiment
•
Did not show the Kelvin-Mach
transition of the wake
•
Not all results are explained by the
considered model
Questions for Discussion
●
Do you think this
speed of water
is
constant
or does it
depend
on some kind of parameter?
●
The envelope line of the
Mach cone
is created by the boundary of
air and created vacuum
, but the shape of the Ship wake is
created by the boundary of water and water. Did you consider
that, and do you think that can affect your theory?
●
Sound waves are created by difference in pressure of air,
however water is
incompressible
. So what is the
main
difference
in the pattern of the wake from the Mach cone?
Questions for Discussion
●
Are these the
full formulas
for water
dispersion relations
?
●
Do you think that the
gravity waves
model holds of
all sizes and
speeds
of ships?
Thank
You!
Slidesgo
2022
Explore the visual similarities between ship wakes and Mach cones, considering various parameters such as boat velocity and length. Delve into wave equations, dispersion effects, and experimental results while addressing questions on water speed, wake formation, and wave models. Analyze the correlation between theory and experiment, emphasizing the importance of understanding water dispersion relations and the impact of different ship sizes and speeds on wave patterns.
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Presentation Transcript
Slidesgo 2022 6. Ship Wakes: Opposition Opponent: Petar Petrov Team Bulgaria B
Slidesgo School 6. Ship Wakes The wave pattern produced by a ship moving on the water is visuallysimilarto a Mach cone and depends on various parameters. Investigate the effect.
Theory Many wave equations and explanation of simple waves Mention Dispersion Wrong explanation of the effect Should not use Mach angle aproximation No Explanation of the effect of dispersion in ship wakes Mention a constant
Experiment Include different velocities of the boat Different lenghts of the boats No taking into account the length of the boats No explanation of the considered constant wavelengths
Results Claculated errror Fitted the experimental data with a model Correlation between theory and experiment Did not show the Kelvin-Mach transition of the wake Not all results are explained by the considered model
Questions for Discussion Do you think this speed of water is constant or does it depend on some kind of parameter? The envelope line of the Mach cone is created by the boundary of air and created vacuum, but the shape of the Ship wake is created by the boundary of water and water. Did you consider that, and do you think that can affect your theory? Sound waves are created by difference in pressure of air, however water is incompressible. So what is the main difference in the pattern of the wake from the Mach cone?
Questions for Discussion Are these the full formulas for water dispersion relations? Do you think that the gravity waves model holds of all sizes and speedsof ships?
Slidesgo 2022 Thank You! CREDITS: This presentation template was created by Slidesgo, including icons by Flaticon, infographics & images by Freepik
