Computational Exploration of Collective Motion of Active Fluids Presentation
Computational Exploration of Collective Motion of Active Fluids research focus in the active nematic particles. The main purpose of the my presentation is to show how the use of MATLAB to visualize systems are helpful for the main purpose of the research.
icon search Searchable Transcript
Toggle between list and paragraph view.
[00:00:00.480]Hello everyone. I'm [inaudible], I'm
senior in mechanical engineering.
[00:00:05.670]And today I'm going to talk about my
final project presentation in UCare.
[00:00:10.530]I worked under professor
[inaudible] in the topic,
[00:00:14.580]computational exploration of
collective motion of active fluid.
[00:00:19.320]And this is in the department of
mechanical and material engineering in the
[00:00:24.090]university of Nebraska-Lincoln
let's get started with a brief
[00:00:28.410]introduction about active matters.
[00:00:32.010]Active methods are used to describe a
large collection of particles that excerpt
[00:00:36.150]energy from the surrounding in order
to convert it to mechanical energy,
[00:00:40.950]which in most cases are result
in striking spatial temporal
[00:00:47.010]There are three main forces are
responsible for active matter movement,
[00:00:51.510]which are internal deriving pores
generated by the conception of energy,
[00:00:56.670]which called self-propelling and
then forces due to interaction with
[00:01:01.470]each other particle and then,
uh, environment and noise.
[00:01:06.390]And this is quoted from
purpose or pediatric or river.
[00:01:09.990]So more system will go
to an equilibrium state,
[00:01:12.900]unlike active methods that
the [inaudible] to individual
[00:01:17.490]energy disputing active matter
origins for most cases are
[00:01:22.290]from biological. And it can vary insights.
[00:01:25.770]Example from size small size to
a bigger size will be Lectio area
[00:01:30.690]solar met, or school of
fish and flocks of birds.
[00:01:34.800]And here are figures one show,
[00:01:36.540]some example of those and the flux
[00:01:41.370]of flux of where the school of
fish and sea will be a large
[00:01:46.170]amount of human since they have the
ability to convert chemical energy inside
[00:01:50.640]the work body into mechanical
energy and the is a big deal. Yeah,
[00:01:55.980]so the research would focus on a specific
type of active monitor called active
[00:02:00.750]in the metrics activity metrics have
our road light shape of our micro scale
[00:02:05.370]particles, which has the ability
of self propulsion and active.
[00:02:09.750]And pneumatics is a,
[00:02:11.160]is the active version of crystals
used in liquid crystal display
[00:02:15.810]NCD, which are commonly used nowadays.
[00:02:19.980]What did from [inaudible]
the ability to control
[00:02:24.960]and there itself,
[00:02:25.890]I simply have active pneumatics
can lead to design and synthesis of
[00:02:30.600]materials and systems that they
want straight energy Convergint and
[00:02:35.280]soil capability found in
nature active. They might,
[00:02:39.000]this can be the foundation
material for adaptive meta material
[00:02:43.860]with dynamical behavior.
[00:02:46.770]Going through the motivation
of this here, uh, is,
[00:02:50.390]is to be able to design such meter
devices, X habit think desirable,
[00:02:55.350]split spatial temporal
pattern that are for
[00:02:59.920]extracting chemical energy at
was length scale micro meter
[00:03:04.720]and converted into useful mechanical
work at larger scale meters
[00:03:10.540]and active animatics can also be
programmed to generate fluid flows that
[00:03:15.490]drive assembly of other
particle and polymers.
[00:03:18.880]And this will be useful
in a bio bio medical uses,
[00:03:24.430]a deliver a direct delivery system in
order to deliver the drug to certain to
[00:03:29.350]certain areas, uh, will
be used by, excuse me,
[00:03:34.210]will be used by, uh, active animatics.
[00:03:38.050]So figure three here, just, uh, show, uh,
[00:03:41.140]what we already explained about,
uh, active matter that, uh,
[00:03:45.990]unlike a passive particle
does not have a Librium state.
[00:03:50.470]So in the top picture,
[00:03:52.060]which is about the passive
and system or classical fluid,
[00:03:56.410]we know that after, uh,
after mixing the fluids,
[00:04:00.040]after some time, it will
go to ACLU equilibrium.
[00:04:04.180]We are Kibby dynasty,
[00:04:06.460]which is showing on the volume
of the H picture, just 30%,
[00:04:10.600]the thermal energy, wherever
in the barn picture,
[00:04:14.410]the active matter after a long time
will not go to an equilibrium, uh,
[00:04:19.300]due to the self per pool
or for appealing, uh,
[00:04:23.350]of each particle. And there will
be interaction with each particle.
[00:04:27.350]So there is no equilibrium. However,
[00:04:30.250]it will go to a steady state to going
through the method to control and
[00:04:35.230]the active assembly of, uh, active
animatics. It is important to the active,
[00:04:40.200]and it might take system as flexible
or flowing in a background fluid
[00:04:45.250]to do this. MATLAB will
be used to weather.
[00:04:47.910]Those systems as a little art flow
will be used for the analyzes.
[00:04:52.330]The equation for the streamlining
of the cylinder flow is given by the
[00:04:55.990]following. We are, you will notice
the maximum velocity of the fluid.
[00:05:00.520]And then L is the wave
length of the exchange.
[00:05:07.450]And then from fluid mechanics,
[00:05:09.130]we can derive the velocity
field in the X and Y direction.
[00:05:13.570]And also we can derive the orientation
of the particle and the orientation
[00:05:18.520]of the particle will represent
how, how the particle,
[00:05:21.980]the sorority I think about itself
or its center alpha is, uh,
[00:05:26.980]about, uh, alpha is equal to the
particle act, Accenture certainty,
[00:05:31.690]which are present how
the particles are shaped.
[00:05:34.510]So for a alpha equal to zero
[00:05:38.710]or alpha equal to zero, the
particle will be as Sephora Oracle,
[00:05:42.970]where emphas alpha equal to one.
[00:05:45.760]It's what we will be
used to for our study,
[00:05:49.000]which will be a road like
where vs has just the swimming
[00:05:55.450]And just to mention the swimming of
meter here is just to represent the self
[00:06:01.880]the self-propelling will be something
like an engine that will move only for
[00:06:06.410]work and the particle acts.
[00:06:08.760]So it's going to move to the
right to the left or to the back.
[00:06:12.740]The only force that will represent
the swimming barometer is just on
[00:06:17.720]the, on the forward direction,
[00:06:21.320]going through the result and
death. And the goal is to,
[00:06:24.560]to investigate the effect of V S
and alpha in the cellular flow. Uh,
[00:06:29.060]we will be using the independent flow,
[00:06:31.970]which means X not will be
equal to zero in the steam line
[00:06:36.410]equation, which is X amount
of T. And then we will,
[00:06:40.280][inaudible] the equation by introducing
the guard stimulant and timescale,
[00:06:45.650]which are L and L of our unit
and the swimming parameter
[00:06:50.480]V S equal to VP of our unit.
[00:06:53.510]And we will use our own diminishing
condition on this space and also,
[00:06:58.400]or not on this space, on the, on the
region that we will be analyzing.
[00:07:02.570]And then the figures will
be in a steady state,
[00:07:05.930]which mean of Tagalog time. And
MATLAB, of course will be used.
[00:07:10.370]And here is just then a picture
of how the fluid is moving.
[00:07:14.450]So we have kind of four sales. So if,
[00:07:18.590]if any particles are
moving inside one sales,
[00:07:21.950]then most likely it will be
a therapy inside that sales,
[00:07:24.920]where if a party can move between sales,
[00:07:27.620]this will be for most cases, it's,
[00:07:30.410]we'll just be moving around the
sales, not entering the sale.
[00:07:35.450]So after the investigation,
[00:07:37.550]we show the relation between
alpha and a V S so the top two
[00:07:42.320]pictures also dimension that
the blue particles are a blue
[00:07:46.970]particles, which move between boundaries
and North particles, which are corrupt.
[00:07:51.800]So the top two pictures or
figures show the relation
[00:07:56.540]when alpha is constant while increasing vs
[00:08:01.340]excuse me. So increasing vs
will result in particles,
[00:08:06.170]the more particles escape the sale.
[00:08:10.100]While if we look at the left,
two pictures above each other,
[00:08:14.600]we see the relation as
we fixing V S so as we
[00:08:19.310]decrease, uh, alpha, as
we decrease alpha, more,
[00:08:24.350]more, uh, sales will be trapped inside.
[00:08:28.790]So in conclusion,
[00:08:29.900]there is a goal is to investigate
and analyze the behavior of active
[00:08:34.400]pneumatics in order to develop
designs and syntheses of material and
[00:08:38.930]systems that demonstrate energy
Convergint and strong capability found in
[00:08:43.760]nature. Excuse me.
[00:08:46.970]So far we studied and analyze
the effect of self perpetuating.
[00:08:50.990]We S four road like shape particles,
which are called pneumatics,
[00:08:55.890]and that's mean alpha equal
to one or close to one,
[00:09:02.040]Excuse me, isn't necessarily
that are in a alpha,
[00:09:05.460]alpha equal to one NSL at our flow.
[00:09:08.970]So as we S more particle
can secure escape from sales
[00:09:13.740]while decreasing alpha mean
may make particles trapped
[00:09:18.300]inside the sale and the
future of this research, uh,
[00:09:22.650]there are search we'll explore active
pneumatics in more depth and investigate
[00:09:27.240]time dependence flow of the vibe
of the five bars and the ability
[00:09:32.160]of five bucks to form coherent, spatial,
[00:09:35.130]temporal stark jar with, and
without noise. Thank you.
[00:09:39.480]Thank you for listening and have it
Gary Day carries. Is there a difference?
Log in to post comments