I'm currently working on a precise glue/resin dispenser, and I'm trying to derive an equation for the force one must exert on a syringe plunger as a function of the desired flow rate Q, and also accounting for the fluid viscosity and the syringe barrel and needle geometry. I've attached a scan...
I investigated the flow rate of differing dilutions of glycerol through an orifice of a vertical tube and obtained the following:
I'm looking for a way to quantify these results so looked to Poiseuille's Law;
I'm pretty sure my graph does not show inverse proportion? Could anyone advise me as...
Homework Statement
So, the question is based around an experiment to determine the coefficient of viscosity for water (by capillary flow).
Part of the experiment involved producing a graph of Q against h. This graph is supposed to be linear, and is supposed to pass through the origin.
As can be...
Hey guys, I am doing an internship and I have had some thoughts about fluid flow that have come up and I am having trouble fully grasping some concepts due to no one being able to thoroughly explain any answer that they might come up with.
So I have a crude understanding of some fluid dynamics...
I am trying to come up with a mathematical model so that, when the displacement of the plunger of a syringe is know, I can calculate the amount of a specific liquid in the barrel. Or the relationship between the speed of the plunger and flow rate at the tip of the needle (Again assuming that the...
Homework Statement
At resting, can you breath sufficient air through a tube of 100 cm length and 2 cm radius?
normal resting respiration rate: 10 - 20 breaths per minute (3 - 6 seconds per breath)
normal resting respiration volume: 0.5 L
normal pressure difference in respiration = 1 mmHg =...
Homework Statement
Using dimensional analysis deduce the relationship between the pressure drop per unit length along a cylindrical pipe of radius r, and the radius of the pipe, the viscosity of the fluid in the pipe, η, and the volume flow rate, V ̇ .
Homework Equations
Δp/l = 8ηV...
I can't figure out why the length the a pipe (L) increases the change in driving pressure with respect to this law:
Delta P = (8*mu*L*Q)/(pi*(r^4))
I would think that delta P wouldn't change because the fluid is incompressible.
Does anyone have a conceptual explanation for the simple...
Homework Statement
The problem is if i have a barrel of water, and at the bottom there is a pipe sticking out going horizontally (leading to an open end), how do i determine the pressure difference?. I think I am right in saying the pressure at the end of the pipe would be pressure from the...
Ok first of all before I get to this I have one question,
What does loss of hydrosatic pressure due to resistance mean in this equation. What happens to the molecules when they lose hydrostatic pressure, do they stop moving and accumulate?
Poiseuille's Law says that if you decrease the...
The pulmonary artery, which connects the heart to the lungs, has an inner radius of 2.8 mm and is 8.5 cm long. If the pressure drop between the heart and lungs is 400 Pa, what is the average speed of blood in the pulmonary artery?
I am using the equation pi*r^4(p1-p2)/(8*viscosity*length)...
I'm having difficulty with a question and would appreciate a point in the right direction. The question is, "What is the flow rate of a tube that consists of two sections, the first with length 20cm and radius 0.15cm and the second part with length 1.0 cm and .05cm radius. The pressure...
Trouble with a problem. What is the flow rate if a tube consists of two sections, the first with a length of 20cm and radius 0.15cm and the second part with length 1.0cm radius 0.05? with a pressure difference across the entire tube of 3cmHg (p1-p3). (viscosity = 0.801 cP)
I've tried this...