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The pressure flow theory describes the movement of food through the phloem. The theory was originated by Ernst Munch.
Vern Kovacek
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What is mean by cold chamber die casting machine?
cold chamber die casting machine can be divided into the direction of the direction of the flow of fluid in the hydraulic system used to control or regulate the pressure and flow valves, pressure valves and flow control valve three categories. A same shape as the valve, because of the different mechanisms of action have different functions. Pressure valve and flow valve with a throttle effect of the flow passage cross section to control the system pressure and flow direction valve replacement of the flow passage control the oil flow direction.
How is supersonic flow produced in a de laval nozzle?
Supersonic flow is produced in a de laval nozzle by constricting the flow in the center in order to increase the velocity. The shape will be hour-glass in nature. The initial mass flow rate and inlet pressure must be sufficient to produce a supersonic choked flow and the discharge pressure must be sufficiently low enough for supersonic flow to occur.
What is critical pressure in nozzle?
Critical pressure in a nozzle is the pressure at which the flow of material through the nozzle reaches its maximum. Beyond which any increase in pressure will not result in an increase in flow. The point at which the velocity of a fluid in the throat of the nozzle reaches the local speed of sound, creating a sonic wave, or a sonic choke.
What is the function of the impeller in a centrifugal pump?
Impeller make the flow has velocity in a centrifugal pump. The purpose of pump is increasing the pressure. The flow has velocity envergy via impeller and the energy change to pressure energy in diffuser.
What is the difference between normal flowrate and Actual flow rate?
Normal flow is 100% of the flow you actually expect. Rated flow is the maximum safety factor times the normal flow. i.e. for a maximum safety factor of 1.2 Normal flow = 100 gpm Rated flow = 1.2*100 gpm = 120 gpm Safety factors are applied to ensure a piece of equipment has some flexibility of operating conditions in its application. The minimum flow is the minimum safety factor time the normal flow i.e. i.e. for a maximum safety factor of 0.5 Normal flow = 100 gpm Rated flow = 0.5*100 gpm = 50 gpm If sized properly a pump specified in this way could operate at any point between 50 and 120gpm with no problems.
What happens to flow when pressure is increased?
Pressure decreases.
What is critical flow in fluids?
Critical flow exists when at a fixed upstream pressure the flow cannot be further increased by lowering the downstream pressure. Flow is proportional to the square root of the pressure drop.
Does pump create pressure?
No. Pumps create flow. Resistance to flow creates pressure.
What is the impact on flow and pressure when the impeller of a pump is trimmed?
Both pressure and flow decreases
What happens when a hydraulic pump speed changes?
The flow and pressure changes. eg: If the speed is increased, the flow and pressure will increase. In some cases this could be regulated by flow and pressure control valves and the final flow/pressure result might be the same.
Does static pressure affect flow rate?
Static pressure certainly does affect flow rate. Static pressure can slow or speed up flow rate based on the liquid.
What is the relationship between flow rate pressure?
With the increase in flow rate the velocity of the fluid increases. and with the increase in velocity the pressure decreases, because there will be pressure drop (Refer Bernoulli's Theorm). So with increase in Flow rate the pressure decreases.
Why do winds not simply flow down a pressure gradient?
Why don't winds simply flow down a pressure gradient?
What is a pressure differential?
its pressure between suction and discharge flow...
Is the pressure gradient equal to gas flow over resistance?
no gas flow is equal to pressure gradient over resistance
Voltage is pressure and current is flow what opposes flow?
Reverse current.
Is blood flow measured in mm hg?
The "flow" isn't, but the pressure is.
