okay here we are the 2020 final
examination official video for the fluid
dynamics course this is a short video
about the content of the exam and I will
release in the coming weeks another
video to explain how best to prepare and
how best to behave during the exam so
let me focus here only on the basic
important information about the exam the
exam will take place in September 21
2020 from midday 12 to 14 o'clock in a
very large building g26 h1 the exam
itself counts 50% towards your final
grade with the other half being 40% for
the homework and 10% for the quizzes the
where is my slide here the registration
for the exam is mandatory so you need to
take a decision about three to four
weeks before the exam whether you want
to attend or not and register for the
exam through the LSF system I cannot do
this for you you have to decide
individually whether you want to attend
or not the exam lasts two hours to
complete hours 120 minutes and it is
closed book you cannot bring your own
books in your own notes with you on exam
the exam has six exercises the first one
is mandatory and it counts 10% and among
the five remaining exams you can choose
three sorry among the five remaining
*exercises* you can choose three and each
of those three will count 30% towards
the grade you can attempt as many as you
want as many problems as you want but
that will only count the three best
answers among the five here yeah
so let me perhaps represent or repeat
this information here presented
in a different way there are six
problems in total you will have to solve
problem number one which is 10% and then
you choose among the five remaining here
you choose three and you can attempt
more if you want but I will pick for
you the best three exercises the rules
for the exams are like this you get a
formula sheet and the content of the
formula sheet will be released just in
just a few weeks it is the content of
the theory section before every problem
sheet at the start of every problem sheet
there is a box with a reminder about the
main equations that you need to solve
the problems the content of this is
repeated at the start of the exam so the
goal for me is that you do not have to
memorize useless bibliographic
information but you have available the
main equations you need to solve through
the problems this includes the Moody and
the viscosity diagrams that we use
through the semester calculators are
allowed all kinds of calculators
including programmable calculators you
can type into your calculator the whole
navier-stokes equations if you like but
your calculator must not be able to
communicate with other devices so said
shortly if you can take your calculator
and smear it against your face and
you can talk to somebody else through your
calculator then it's not a calculator
okay so do check with me totally cool to
have programmable calculators not cool
to have calculators that allow to
communicate with other machines or with
humans no documents are allowed except
for language dictionaries so you can
bring with you language dictionaries a
word to word dictionary not a technical
book about fluid dynamics but the
language dictionary into your language
so that you understand the words and
grammar better
there is no communicating devices no
pencil cases and no bags allowed in the
room you can leave your stuff on the
sides of the room at the front of the
room you may leave whenever you wish
during the exam but not in the last 10
minutes because otherwise it gets a
little too noisy and too messy there's a
list of examinable problems this list is
finite is complete you will not see
problems in the exam that are not in
list here and this list is like so I
will repeat this list in the appendix of
the notes very shortly in just a few
days and you see you have problems from
chapters two three four five six and
then also from chapters
seven eight and ten. Chapters nine on
turbulence and chapter eleven on large
and small scale flows are not examinable
this year the first problem that is
mandatory that counts ten percent in the
exam this problem is always
exercise six point two yes it is the
problem that asks you to write out the
full expanded version of the
navier-stokes equation or of the
continuty equation and to explain what
the conditions associated to those
equations are so just practice with
those this problem is not about
remembering the capital of Kazakhstan or
something like this it is always the
very same theoretical question the other
problems are lightly modified versions
of problems you have worked on during the
semester in the problem sheets typically
to modify a problem I will take it I will
will change the size of the parameters
the lengths lengths are different the
velocities are different and I will
typically change the direction of a few
things so I will turn the wheel the
other way will have the flow come from
the bottom instead of coming from the
top but the problems are largely
recognizable in fact I promise you will
open the exam on September 21 and you
will recognize things that you have seen
before in the problem sheets exam papers
are independent year-to-year I do not
try to have a homogeneous coverage of
the chapters I do repeat exercises from
exam to exam from year to year so do
not do not try to guess the content of
one exam based on previous years it
doesn't work that way
exam papers are independent year-to-year the grading policy is as follows
on some questions you need to be very
clear and continuous and this type of
question is questions that go
"starting from equation so and so prove
that equation so and so" yes that kind of
questions when you answer them you have
to be complete continuous and clear for
all the other answers
where you're asked to calculate
something if you have a stroke of genius
and you suddenly know that the force is
minus 12 Newtons then you write this out
you will get full points and no
questions asked
yes so the correct results with a
correct unit is enough to get full
points however if you are wrong then the
more you have told me about how you
calculate things and the more points I
am able to give you for your wrong
answer
yes I do I do give as many points as I
can but you need to show me what your
work is yes before that important
illegible or ambiguous answers answers
that I cannot completely comprehend they
are always discarded there used to be a
time as a young teacher when I would
really really try to decipher poorly
written answers and I'd go to my
colleagues and ask them to interpret
what they understood in
students' papers I do not do this anymore
if it's not one percent clear whether
it's a plus or a minus
whether it's a nine or three then I just
discard the result yeah so you need to
write it off clearly because you are
engineers and a few remarks to conclude
the passing grade is variable I intend
to have a passing grade at 50% but
sometimes the performance is a bit low
and so I reduce this passing rate to 40%
however in the last years it has been
50% and I hope it will remain so the
success rate of the exam is not fixed at
all I'm not grading on a curve in the
last few years it has oscillated between
73 percent and 84 percent I would love
this to become a hundred percent I would
not have any problem with that
so I will try a year after year to
improve the grades and success rates
of the students my advice is to read and
work through the previous papers at
least read them a one previous paper the
previous the paper from last year and
its complete answer are in the appendix
to the lecture notes and I will release
all the other papers I have with the
complete answers on the course website
in the coming weeks so do go through
those at least to see how at least to
see what the pattern is and how I built
different exams and certainly to
practice solving the problems I advise
you to print out the lecture script for
sure and certainly the formula sheet so
the beginning of the exam because it
helps with preparation having it on
paper and having worked with it many
times will help you during the exam but
I will release another video about this
soon
and finally the concluding remarks are a
little bit academic but I really mean
this this exam is about work discipline
it's about proving you have done your
homework and you have worked through the
problem sheets it is not about talent
it's not a point where I say "and now
let's see whether you have really
understood and let's apply this to a new
kind of problem" this is not this it's just
showing that you know the method to
solve all the problems that you have
sold before that you understand the
method to do it and you can do it
quickly so in a way it's not about being
talented it's not about being incredibly
intelligent and fast during the exam
it's about just repeating what you have
done before it's not about being lucky
either so I hope yes my intent building
this exam is to give you a clear
objective to work towards when you are
working on the course on the problem
sheets during the semester so with this
I wish you a very fruitful revision and
I will see you in September 21 in the
exam room bye bye.
