Fluid dynamics Definition and 643 Threads

Let's say that you're deep under the surface of the water in a submarine type thing. There is a hatch on the top. Let's say that the absolute pressure on the top of the hatch was calculated to be 2 atm. Inside the vessel, the pressure is only 1 atm. Someone is inside the vessel and...

I would really appreciate any help with this problem. I'm pretty stuck. Homework Statement An incompressible viscous fluid occupies the region between two parallel plates. The lower plate is stationary and the upper plate moves with a velocity u. Find the velocity of a steady...

I am very interested in fluid dynamics. Are there any research opportunities in fluid dynamics? And what should I major in undergrad? Thanks.

Homework Statement Tank is filled with water to a height h_0 = 1.00 meters Cross section area of tank (A_1 = .785 m^2) Hole at bottom of tank with an area, A_2 = .002 m^2 Homework Equations How much time does it tank to half empty the tank? find t_(1/2). Question also provides "a...

Hey all... My scenario is as follows: I have a pump that provides a certain rate of flow in my system. The pump is connected to a spraybar, a pipe with holes drilled through at evenly spaced intervals. Each of these holes is fitted with a 90 degree nozzle (effectively a miniature 90 degree...

Homework Statement A sheet of aluminum of thickness .01 m lies in a parking lot. A wind blows over the top of the sheet. What is the minimum velocity that will cause the sheet to begin to rise: Assume the density of air is 1.18 kg/m^3 and aluminum is 2700 kg/m^3. Homework Equations...

A very interesting 3 minute video showing the kaye effect. This is a very neat and unexplained phenomenon in fluid dynamics physics. http://www.spikedhumor.com/articles/95526/The_Kaye_Effect_in_Motion.html

Homework Statement There is a building with 3 floors: ground floor, first floor and second floor. Ground floor is at level zero, first floor is 3 meters above it and second floor is 6 meters above the ground level. The hydraulic system is made in a way that water barely reaches the second...

Hey all... I'm trying to write a technical report and one part involves calculating the rate of flow of water through a straight horizontal weir. Searching on the web has led me to the Francis formula, which seems to be pretty straightforward. The problem I have is that my specific...

Homework Statement This is my creation. I have a reservoir at an height h and another one on the floor. I connect them through a pipe with constant diameter. If the water start flowing from the higher reservoir to the lowest with will flow with constant velocity. This is true, isn't it? By...

I installed a shower head in a customer's bath tub last week. The customer was not happy with the flow of water coming from the shower--so I removed the shower head and noted the orfice that leads to the spray area in the shower head was only 3/32" in diameter. I drilled a hole enlarging the...

Hi, a pretty simple question here. Please refer to http://en.wikipedia.org/wiki/Image:Hydraulic_Force.png" If there was no small piston, and instead just a higher column of water on the left hand side, would it still operate like a hydraulic press? E.g. would the larger area of the...

Hi, I have been doing a simple experiment with a 2L bottle and a cut out slot near the bottom. I have gathered data regarding the time it takes the water level in the bottle to go from 13cm above the slot to the slot itself, versus the area of the slot. My data shows a perfect inverse...

Hi, I have been doing a simple experiment with a 2L bottle and a cut out slot near the bottom. I have gathered data regarding the time it takes the water level in the bottle to go from 13cm above the slot to the slot itself, versus the area of the slot. My data shows a perfect inverse...

A pressurized cylindrical tank, 5.0 m in diameter, contains water which emerges from the pipe at point C, with velocity 29 m/s. Point A is 10 m above point B and point C is 3 m above point B. The area of the pipe at point B is 0.08 m^2 and the pipe narrows to an area of 0.04 m^2 at point C...

Air flows from left to right though a horizontal pipe that has different diameters in two different sections. the narrow section has a radius of 5 cm and the wider sectio nhas radius of 20 cm. At point 1 (r=5) the air is flowing with a velocity of 10 m/s and has an absolute pressure of 150000...

if you are given that a pressure displaces an oil (density = .85g/cc) 25mm in a contraption that looks like a long u shaped test tube, how would you find the realitve pressure difference?

jaaa 1st post! god please hlep me just becuase it is we have this weird experiment given to us and its about how if u get a water flowing down a tube and make it slide down and hit a surface and make it flow hard/fast enuff the water makes a shape of a circle with some radius. we're supposed...

I'm looking to do something in the field of aerodynamics and/ or fluid dynamics...I want to go into aeronautical engineering when I do my undergrad, I am posting for a essay tittle which proposes certain interesting problems in those two fields. The essay should be 4000 words long and the more...

For summer session I, I have two classes, Fluid dynamics and Technical Writing. I went to Fluids class today, and it was superb :approve:. My professor is an Indian guy who works at NIH. I like his teaching style. He writes on the board beautifully. It's almost like reading a textbook on the...

I'm planning to do an extended Essay for the IB Diploma in Physics. I want to do something on Fluid Dynamics. I was thinking of investigating terminal velocity and effects on drag and upthrust to terminal velocity. That investigation will of course involve Stoke's Law. BUt I think that might be...

Hi all! I am currently choosing the topic for my dissertation, and am struggling between heat transfer and fluid dynamics. What would you guys say on these two discisplines? It seems to be that they are quite inter-related, and both of them are quite theoretical and mathematically intensed...

Hello everyone this is my first post. I'm trying to learn Fluid Dynamics On my own. I'm already a Physics Student,I have a Book for Landu And Lif****z Course of Theoretical Physics Volume 6 (Fluid Dynamics),SO far i see the book very good,but i was wondering if it's enough to learn it from...

Okay, here's the question: A jet of incompressible fluid emerges from a horizontal channel into an environment of the same fluid. The momentum of the jet at the exit of the channel is measured to be M. The exit momentum is the source of a downstream flow which spreads gradually with...

http://portfolio.iu.edu/whoblitz/problem.png I think Bernoulli's equation is involved in solving this problem, but past that I'm not sure what the pressure of the water inside would be or what it would be outside. Any advice appreciated, as always.

I just like someone to help check my answers please o:) Gil is a perfectly spherical fish bred specifically for use in physics problems. Gil has mass of 33.5 kg. By inflating/deflating his air bladder, Gil has the ability to change his volume while his mass does not change appreciably. Gil...

A steady two-dimensional flow (pure straining) is given by u = kx, v = -ky, for k constant. (i) Find the equation for a general streamline of the flow, and sketch some of them. (ii) At t = 0,the fluid on the curve x^2 = y^2 = a^2 is marked (by an electro-chemical technique). Find the equation...

for some reason my brain is dead on this one: diagram: http://img.photobucket.com/albums/v11/biggm/diagram.jpg here is a u-tube of uniform cross sectional area, partially filled with Hg. water is poured into both sides and the equilibrium is as shown. the value of h2=1.00cm. I am to...

i'm an engg student.i need to know what CFD is all about and what is its scope

The other day I was driving down the highway behind a Fertilizer Truck. It had a huge plastic reservoir of liquid fertilizer on the back, essentially a large cylinder lying on its side. The reservoir was not full and it was partially translucent, so I could see the fertilizer sloshing around in...

I am doing a 4000 word essay on the quickest way to pour water out of a bottle and i need some help with the theory and formulas etc. I've tried looking but this experiment isn't well documented so any help would be great!

Hello everyone. 'A carton of milk is placed on a table. It has 2 holes pierced through a vertical side. At one point in time, the 2 jets of milk flowing out are reaching the table a the same point. Determine the height of milk in the carton as a function of the respective heights y_{{s}} and...

I know simple finite element method problems and want to get myself upgraded to CFD. What is the simple and best web to learn that?

Hi all any ideas wat computational fluids dynamics is all about.. how should i go about using it, using codes? Wat kind of codes are used? Is it C programming or stuff like that? Thanks regards ss

Does anyone know anything about fluid dynamics concerning syphons? Or know where to find info on them? I need to find the velocity as it leaves the tube and the net force... Thanks

Does anyone know anything about syphons in fluid dynamics? Or maybe a site that i could find info? I need to find the velocity of the water as it leaves the pipe...

Hi everyone I have a relatively simple fluid dynamics problem I need some help with: We have two cylinders L and R of crossectional areas A and 2A respectively. Initially, the level of water in X is H and Y is empty. At t = 0, the two cylinders are joined at the bottom by a tube of...

I have this flow field in cylindrical coordinates of which I would like to calculate the dissipation as a function of these coordinates. Now in my fluid dynamics notes I found the following expression(s) for the dissipation: 2 \mu (e_{ij} -\frac{1}{3} \Delta \delta _{ij} )^2 = 2 \mu (...

It's not so simple to me being that I have no background in fluid dynamics, but it seems like it would be fairly simple for most mechanical engineers; anyway: This is to help me with the design of my charge pipes in my custom turbocharger setup. Assuming a constant radius throughout, which...

Hi! Great website I just wished I had discovered it earlier. :smile: Here is my simple question and I would appreciate any tips or links where I can find more information. Problem: I would like to calculate the mean flow or velocity distribution along the central axis of a narrowing cone...

I'm going to attempt to articulate my question with appropriate lucidity, but please let me know if I fail to do so. I am a vintner (a wine maker), so achieving a palatable batch of wine necessarily elicits some required understanding of chemistry and physics. I understand that the wine...

Given a container with a gas, assuming a constant internal/external pressure differential, with a hole of a particular diameter/area, what is formula to compute the rate at which the gas exits the hole. Assume we're talking ideal gas or air and anything else that I haven't given, but are...

anyone know any theories being used for fluid dynamics? any formulas? I aint no physicist, I am just curious. Are there any developments today involving jet propulsion by going faster with only half the fuel? if that sounds right. any help would be appreciated