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Fluid Dynamics
The study of the motion of fluids (liquids and gases) and the forces causing this motion, Fluid Dynamics has several subdisciplines, including hydrodynamics and aerodynamics. To ask and answer questions about Fluid dynamics and its subdisciplines, come on in to the Fluid Dynamics category.
621 Questions
Would it be possible to drink from a straw a mile long?
Yes, but it would have to be tilted, almost flat. You can only drink through it
if your mouth is not more than 33 feet higher than the surface of the liquid
that you're drinking through the straw.
Why do gases get bigger and spread out?
because every particle is moving in a random direction and a speed determined by temperature. these particles will continue moving in this direction until they hit another particle or wall, they will then rebound and travel the opposite direction thus causing pressure.
Why would all the sugar not dissolve in a glass of tea?
In a Solution i.e your tea, only so much sugar can Dissolve. If you put loads of sugar into your tea, it can become a saturated solution. This means that the excess molecules of the sugar have no more room to dissolve into the tea, therefore it just sets at the bottom like sand.
More Information:
It is possible that enough sugar was added to the tea to saturate it, at which point no more sugar would dissolve, but that takes a lot of sugar. So, it is more likely that more time was needed for the sugar to dissolve. This process can be hastened by inverting the sugar (by adding a bit of lemon juice and/or corn syrup [glucose])
When a 10-N object is suspended at rest by two vertical strands of rope the tension in each rope is?
If the ropes are perfectly vertical AND both of them are indeed sharing the load,
then the tension in each rope is 5N. But it would be practically impossible to have
them exactly share the load, and one would wind up supporting most or all of it.
The best way to make them share is to use elastic ropes, like bungees. They still
would never share equally, but at least they would share. In any case, the
tensions in both support strands would always add up to 10N.
What do you mean by prime the line by opening air bleed valve V3?
"Priming the line by opening air bleed valve V3 means releasing any trapped air from the system to ensure proper flow of fluid through the line. This helps prevent air pockets that may cause inefficiencies or malfunctions in the system."
Why does pressure drop across a horizontal flow pipe?
Pressure drops across a horizontal flow pipe due to frictional losses caused by the roughness of the pipe walls and the viscosity of the fluid. As the fluid flows through the pipe, it experiences resistance, leading to a decrease in pressure along the pipe's length. Additionally, changes in elevation and fluid velocity can also contribute to pressure drops in a horizontal flow pipe.
Why total internal reflection takes place?
It happens when light travels through a material that has a greater "optical density" (refraction index, really) than a bordering material, and when it touches the surface at an angle that is sufficiently flat.
Do some converting first.
688 calories (4.184 Joules/1 calorie)
= 2878.592 Joules
25 ml of water = 25 grams
q(Jolules) = mass * specific heat * (Temp. final - Temp. initial)
2878.592 Joules = 25 grams Water * 4.180 J/gC * (Temp Final - 80C )
2878.592 Joiles = 104.5( Temp. Final) - 8360
11238.592 =104.5(Temp. Final)
107.55 Celsius Final Temperature ( call it 108 C )
How couid you justify additive and constitutive property of parachor?
The additive property of parachor suggests that the parachor value of a mixture can be calculated by summing the parachor values of the individual components. This can be justified by understanding that the parachor value is a measure of the cohesive energy density of a substance, which depends on its molecular structure. The constitutive property of parachor, on the other hand, implies that the parachor value is a fundamental property of a substance, determined by its chemical composition and structure.
Which fall faster big rain drop or small rain drop?
The viscosity of air provides a drag force on a raindrop and keeps it from falling with the acceleration of gravity. When a drop is falling (assuming it does not combine with other drops in the process) it will reach a terminal velocity which depends on its diameter. The larger the diameter the larger the terminal velocity. Specifically, the terminal velocity is proportional to the square root of the diameter of the drop.
Big rain drops fall faster than small rain drops.
See related links for details and equations.
Does juice have high viscosity or low?
Answer #1: High
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Answer #2:
There you go again.
Compared to what ?
"High" and "low" are two more 'rubber words' ... words that mean different things
to different people all the time, and can even mean different things to the same
people at different times or in different situations.
Oil has high viscosity compared to water and rubbing alcohol, and low viscosity
compared to molasses and molten glass.
What is meant by a volume of STP?
Volume of a gas at STP (standard temperature and pressure) refers to the volume that a gas occupies when measured at a temperature of 0 degrees Celsius and a pressure of 1 atmosphere. This volume is typically given in liters or cubic meters.
The maximum length of the straw can be calculated using the concept of hydrostatic pressure. By reducing the atmospheric pressure by 85 percent, the maximum height difference the lemonade can be lifted is about 11.72 meters, corresponding to the pressure difference. Therefore, the maximum length of the straw would be approximately 11.72 meters.
Is surface tension responsible for wave formation?
No, surface tension is not responsible for wave formation in bodies of water. Waves are typically formed by the interaction of wind with the water's surface, causing the water to move in a rolling motion. Surface tension, which is the result of cohesive forces between water molecules at the surface, does not generate waves.
Is plasma ionized particles in category of fluid?
Yes, plasma is considered a state of matter where the particles are ionized. Plasma is often referred to as the fourth state of matter, distinct from solids, liquids, and gases, as it is composed of ionized particles that can conduct electricity. Fluids typically refer to liquids and gases, while plasma exhibits unique properties due to its ionized nature.
How do you calculate friction losses in pipelines?
pressure loss and friction loss in a pipe can be reduced by 1) using smooth pipes 2) Using straight pipes, because the more bends a pipe has the more energy it will lose. 3)pumping downhill where possible.
What floats and sinks in water?
Objects that are less dense than water will float, while objects that are denser than water will sink. For example, wood, plastic, and cork typically float in water, while metals like lead and iron sink. The shape and size of an object can also affect whether it floats or sinks.
Is pressure exerted by a moving stream of fluid more then not moving fluid?
Yes, pressure exerted by a moving stream of fluid is generally greater than that of a stationary fluid due to the added kinetic energy involved in the flow. This increase in pressure is described by the Bernoulli's principle, which states that as the speed of a fluid increases, its pressure decreases and vice versa.
As the plane hits the deck, its kinetic energy is 1/2 (its mass) x (its speed)2,
so that's the amount of energy that has to go somewhere in order to bring
the plane to a complete stop where its kinetic energy is zero.
My guess at the moment is that the energy must be dissipated in one humongous
shock-absorber at each end of the cable. Springs don't dissipate the energy ...
they only store it, and then it still has to go somewhere. Shocks dissipate it.
What factors affect the speed at which objects move through water?
The speed at which objects move through water is affected by several factors, including the shape and size of the object, the density and viscosity of the water, and the presence of any obstacles or currents that may impede its movement. Additionally, the force exerted on the object and the surface area in contact with the water also play a role in determining its speed.
Is motor oil thicker than water?
This is a bad sign. If the water is in the crankcase this can mean that the head gasget has been blown and the water has leaked into places it should not go. Do not drive this vehicle until the problem is fixed.
How do you plot velocity triangle?
To plot a velocity triangle, you can start by drawing a line to represent the direction of the incoming flow. Then draw a line representing the relative velocity of the fluid. Finally, draw a line representing the velocity of the blade. The angles between these lines represent the velocities and can be used to calculate various parameters in turbomachinery analysis.
Which fules causes minimum enviromental polloution?
Renewable fuels, such as solar, wind, and hydropower, cause minimum environmental pollution as they produce little to no greenhouse gas emissions or air pollutants during operation. These fuels are sustainable and have a low environmental impact compared to fossil fuels.
Types of fin in heat and mass transfer?
Geometry
Five dierent n geometries are available. Geometric dimensions to be specied for each fin type are
Straight Fins
Annular Fins
Longitudinal Fins
Rectangular Fins
Conical Fins
Trapezoidal Fins
Parabolic Fins
Cylindrical Fins/Pins/Spines
Truncated Conical Spine
Triangular Fins
