Fluid properties Flashcards
One of the most commonly used measures , m/v
Density
True or false, density isn’t proportional to pressure and inversely proportional to temperature
False
Measure the fluid’s tendency to resist shearing force or to resist flow
Viscosity
What are the 4 Fluid types
Clean Fluid
Dirty Fluid
Slurry
Steam
Layers in the center of the pipe have the highest velocity, while the friction between the fluid and the pipe wall causes lower velocity near the pipe wall
Laminar
Flow profiles often occur with low viscosity fluids. The low viscosity enables turbulent eddies ( whirlpools
) to form, which occur randomly in fluid stream
Turbulent
Effect of the most important factors affecting fluid flow can be combined and expressed with a dimetionless, numerical value called ______.
Reynold’s Number
Intertial force is divided by the viscous force
Reynold’s Number
Rd < 2000
Laminar
Rd > 4000
Turbulent
Rd 2000-4000
Transition
Zero referenced against perfect vacuum
Absolute pressure
Zero referenced against ambient air pressure
Gauge pressure
Differential in pressure between two points
Differential Pressure
Is the volumetric flow rate that would occur if the Process pipes conditions were set at a reference temperature and pressure
Standard VFR
Is the volumetric flow rate at a actual temperature and pressure
Actual VFR
Saturation point
Saturated
Steam heated above the saturation point
Superheated
Ratio of mass of gas to the total mass while the mixture is in the saturated state
Quality steam
T or F to the inside diameter of a process pipe does not remain constant throught the process
T
Higher core velocity may be causes by either a reducer or an expander
Symmetrical profile disturbances
Causes Fluids to flow across the diameter of the process pipe rather than parallel to the pipe
Swirl
Flow condintioners Can be disks with circular holes in them or bundled tubes that are inserted in the process pipe to eliminate ___
Swirl
It may impact the customer’s product quality billing accuracy and process efficiency
Accuracy
Is ratio of maximum to minimum flow rates under which a flowmeter can maintain measurement accuracy
Rangeability
Commonly used as a specification for magnetic, vortez and Coriolis meters
Meter Maximum
Is the ability of a flowmeter to a produce the same measurement each time it measures a flow
Repeatability
Is the differential in pressure between a point before the obstruction and a point after the obstruction
Dp flowmeters
T or F Volumetric flow rate is proportional to the square root of differential presure
T
The volumetric flow rate directly by repeatedly trapping and measuring a sample of the process fluid
Positive Displacement flowmeters
