Fluid Definition and 1000 Threads

I am a mechanical engineering undergrad and i am currently trying to study fluid mechanics but the books i tried are not sufficient enough in my opinion. I read the first three chapters of Fluid Mechanics : Fundamentals and applications by Cengel and Cimbala, and Fundamentals of Fluid Mechanics...

Physics Forum: Can someone show me how to model, mathematically, what happens if you place a drink box with a straw sticking out of it, in a vacuum chamber and apply a vacuum?

I have a question about fluid mechanics. I know it's not completely physics, but in the end, it involves physics: Suppose you are computing the blood flow in an artery segment with length 3 cm and diameter 3 mm. The artery has a constant cross section and its positioned horizontally in your...

I accidentally posted this to the "Calculus & Beyond" forum when I meant to post it to the physics forum. If someone can tell me how to move this post, I will get rid of it here! Homework Statement Consider a property, for example temperature θ, that is conserved during advection (i.e. Dθ/Dt =...

Homework Statement A water tank, 3.7 m deep and 2 m in diameter, is connected at the bottom to a second water tank by using a 2 cm diameter pipe (see the figure). The tank A is open to the air and tank B is filled to the top and sealed. a) what is the mass of the water in tank A...

Hello! My friend and i are interested in doing a project.My area of interest in Fluid mechanics and my friend's is mechanical design can you guys help us out by providing some topics of research which encircles both these areas.

Why do we able to see an object clearly in fluid like water, even if the object is doing a slight movement we are able to see from long distance,for examle in the fish aquerium. My effort- I think so that this is due to refraction of the light or due to some natural property of liquid.

Homework Statement There is a figure of a cylinder of liquid partially immersed in a beaker of a fluid. Why is there a force that pushes up on the cylinder of liquid in the beaker? Multiple choice: 1. The weight of the liquid cylinder and the atmospheric pressure acting on the cylinder is...

I have added a picture of the problem with an attempt for a solution. Please let me know if its right or wrong, and what I have done wrong if its wrong..

People with congestive heart failure (CHF) are advised by doctors to restrict fluid intake. For example, while 8 cups of fluid per day is recommended for healthy individuals, people with CHF are recommended not to exceed 4 cups a day. The explanation, according to a medical student friend, is so...

I am doing "Schlieren imaging" visualization of a gas flow from the nozzle. could anyone please recommend a software to simulate a gas flow from the nozzle. in addition please recommend a software to simulate optics, like the propagation of a light beam through the optics and image...

I have a vertical panel. Top of panel is at water level. Units are in feet. 15'x5'. I calculated the force in pounds. water=62.5 lb/ ft3. I came up with F= 11,718.75 lb Just double checking this, making sure I did I correctly.

According Pascal law we get force high and low to the applying force...why fluid not behave like ideal solid body force transfer mechanism... Mean in fluid,how fluid particle manage grater and lower force to the applied force...how particle s manage it?

Homework Statement The Trans-Alaska Pipeline System (TAPS) carries around 100,000m3 of oil per day from the Northern Alaskan oil fields to the nearest ice-free port of Valdez, around 1300km away. The pipe has an outer diameter of 1.22m and a wall thickness of 12mm. Eleven pumping stations...

I know that if density of an object is equal to density of fluid, the object will be fully submerged hovering right underneath the fluid. My questions related to this concept are: 1. If the density of the object is extremely slightly greater than the density of the fluid, will the object look...

Hello everyone, I have a question regarding the pattern resulting from droplets of fluid onto a hard surface. Set-up In addition to being a full time student I also work full time in the fuel bay of a local trucking company terminal. Not the most glamorous job, but regardless. This question...

I'm not sure if this thread would belong in the Academic Guidance forum, so if it does, feel free to move it there. I'm looking for research topics that might involve thermo- or fluid dynamics, but are centered around grand unified theories. I'm particularly interested in computational fluid...

Homework Statement A tube (both ends open, height h, diameter d) is immersed into water so that length h1 of the tube is above water. Then the top of the tube is covered tightly and the tube is pulled out of the water so that length h2 is above water. The relative humidity of air is \phi and...

I have a non-rigid vessel holding a fluid with a tube for fluid flow out. It is initially at equilibrium pressure with the atmosphere. (Think a water bladder for a camelback hydration system) A pressure is then applied to the bag to cause fluid to flow out the tube. Is there a way to relate the...

So everyone has made non-Newtonian fluid at some point in their lives (when you mix corn starch and water and get that awesome liquid/solid) well in one of my classes last semester we were asked to think of ways to aid in shielding from radiation and MMOD's (Micro Meteoroids and Orbital Debris)...

Hello everyone! I'm a civil engineering (bachelor) student, and I was fascinated by the "hydraulics" course. unfortunately, my study plan doesn't include other courses on the matter for at least one year. Thus, I am looking for some easy books to begin with, to study it a bit on my own...

I am a student of 11th standard and being introduced to Bernoulli's principle made me wonder , how does flow takes place in positive pressure gradient (i.e. from low pressure region to high pressure region), in a diffuser or a diverging part of a venturi meter , since we know that flow always...

A real incompressible fluid is contained in the region between two coaxial cylinders of radii R1 and R2. The outsider cylinder rotates with angular velocity w, in stationary regime, and the flow is purely circular. Neglect the action of gravity. a) Show that vφ (azimuthal velocity component)...

Let \lambda be a linear density of a rope which is moving into a scale at velocity v. The additional force on the scale due to the collision is given as \frac{d p}{d t} = v\frac{d m}{d t} = \lambda v^2 Where as the stagnation pressure from stopping a column of water in excess of static...

A bottle has a mass of 33.00 g when empty and 97.55 g when filled with water. When filled with a mystery fluid the mass is 84.02 g. What is the specific gravity of the mystery fluid? Hopefully helpful equations: p = m/v (p = density, m = mass, v = volume) SG = 1000p Attempt: I'm...

I thought it might be interesting to point out this article: Title: Violation of Bell's inequality in fluid mechanics Authors: Robert Brady and Ross Anderson (Cambridge) Abstract:

Hi, When we want to solve the Navier-Stokes equations coupled with the conservation of mass for incompressible fluids using the primitive-variable approach, we have to face to the problem that the equation for the continuity equation does not contain the pressure which leads to spurious...

Homework Statement The pump in the system below has an efficiency of 75%. The atmospheric pressure is 101 kPa and the vapor pressure is 2.3 kPa (in absolute units). Assume kinematic viscosity is 0.96x10-6 m2/s. Neglect minor losses. a) Calculate the velocity through the main pipe and of...

My friend is trying to reproduce a research paper calculated using the CFD(computational fluid dynamics) software package star-CD sold by CD-adapco, but so far he failed, what can he do? Here is the paper he is trying to reproduce: Endothelial Cell Layer Subjected to Impinging Flow Mimicking...

I was working on a project for which I was considering letting a liquid flow out of a bottle rather than pump it out, but I know that the flow rate changes as the height of the fluid within the container changes, which is an issue. I then remembered that bartenders count time to measure their...

Homework Statement Find the potential of a fluid whose density varies with height according to this relation: ρ = a (H-z2) + 1.5 kg/m3 being H=20m, 15m <= z <= 20m, Mtotal= 200kg. The fluid is inside a cylinder of radius = 2m and height = 5m. Homework Equations Bernoulli equation...

Homework Statement Consider a tube of uniform cross section, let one end (a) of the tube is at height h1 and other end (b) is at height h2, where h2>h. Now an incompressible fluid passing through the tube the workdone to pass the liquid at end (a) P1V1 and workdone to pass the liquid at end...

Homework Statement A tyre pressure gauge indicates 20 N/cm2 for a tire at 34°C after a fast motorway run. Assuming that the volume of the air in the tyre is constant, atmospheric pressure is 760 mmHg and the air gas constant is 0.287 kJ/kg.K: i) Estimate the indicated pressure when the tyre...

Homework Statement Question: http://i.imgur.com/aoXUDP1.png Homework Equations Q=v1A1=v2A2 Bernoullis Equation P=P0 + ρgh The Attempt at a Solution I have got an answer of 3.55*10^-3 m^3 /s. The answer i have been told is 1.29 x 10-3 m3s-1. I am not sure if i am wrong or the answer...

I have been looking into shear thickening fluids and how they are used with Kevlar for bullet proof vests. I am considering alternative uses but have limited knowledge on the subject. I would like to create a rigid solid that becomes harder and less flexible when a large force is suddenly...

Homework Statement One hundred millilitres of water is poured into a U-tube that has a cross-sectional area of 1 cm2. Then 100 millilitres of oil, with a density 80% that of water, is poured down one side of the U-tube so that the oil floats on the water. Find the difference in height of the...

I got a quick question regarding the potential energy of a fluid (see picture). If I want to express the potential energy of a fluid (with a given volume) above the reference line x, using nothing but the given variables/constants, would this be the correct way to do so? picture

Hey guys, I've been wracking my brain for a while, and thus I have landed here yet again. My problem is the following: Say you have a pipeline with a venturi injector, and intermittently a large tank of water with a portion of air on top -- I.e. a closed circuit communicating between the...

Determination of density at a depth in a compressible liquid. Hi all, Let us consider a tank containing some compressible liquid with bulk modulus K and having density at its surface s. Consider some part of liquid with volume V, a depth h below the surface. Due to liquid above it there...

Hi, am having a few problems applying bernoulli's equation when an electric pump is involved. I have attached a picture of the question. I understand how to apply bernoullis for venturi and pitot tubes but when it involves work being done on the system eg. a water pump, fan exhaust I don't know...

Homework Statement In a hydraulic lever consisting of two ideal fluid lined cylinder/pistons with a fluid filled line coupling the two cylinders, the output force is 100 times the input force. For 1 Joule of work done on the input side, the work done on the output side is (in J):Homework...

I've recently heard of an analogy between fluid dynamics and electromagnetism in which the velocity flow field is identified with the magnetic vector potential, (and therefore the vorticity is identified with the magnetic field), and the vector \omega \times v is identified with the electric...

Hello Guys, I have been doing Charpy tests for the past couple of months and notice that I can't get rid of the water that keeps freezing and sinking to the bottom of the my chiller. It's becoming more of a hassle that my agitator stops due to the water freezing at the bottom of the chiller...

There's a figure that comes with the question but I'm having trouble attaching it so I will describe it the best I can. There is a large cylinder labeled the reservoir. A horizontal pipe is connected near the base of the reservoir and it is open at the other end so fluid flows out (point B)...

Hello! I'm working on creating a sci-fi setting for a tactical space combat video game and short story series, and I had a few questions I couldn't find much info on after googling. I'll be playing a little bit loosely with the laws of physics for the sake of gameplay and storytelling, but I...

Hi, I haven't done many problems of this nature so there are a few steps in my working that i'd like to check are acceptable/agree with what the question implies. Homework Statement A water tower is a familiar sight in many towns. The purpose of such a tower is to provide storage...

Homework Statement Suppose a cylindrical barrel falls off a ship and sinks to the bottom of the sea at a depth of 1.61 km. Assume that the seawater is incompressible, so that its density at the bottom of the sea is the same at the surface :1020 kg/m^3 If the pressure inside the barrel is...

Help with fluid mechanics!? Suppose a cylindrical barrel falls off a ship and sinks to the bottom of the sea at a depth of 1.61 km. Assume that the seawater is incompressible, so that its density at the bottom of the sea is the same at the surface :1020 kg/m^3 If the pressure inside the...

How could I calculate the volumetric flow of a fluid due to the weight of a piston in a cylinder? At first moment i I thought the Hagen-Poiseuille equation, but I'm not sure. Any suggestions?

Thanks in advance! I have problem that is causing me a headache to no end. In a cylinder, if one knows the total volume of cylinder and total volume of fluid in said cylinder, how would the height of this fluid be computed? I have no problems calculating volumes based on height, but the other...