Fluid Mechanics, Heat Transfer And Statistics Flashcards
Study of liquid at rest
Hydrostatic
Quantitative measure of the amount of matter in a given body
Mass
Classification of flow in Froude No?
Subcritical flow (Fr<1)
Critical Flow (Fr = 1)
Supercritical flow (Fr>1)
Flow classifications in reynolds number
Laminar - Re < 500
Turbulent - Re> 1,000
Transition - 500 < Re < 1000
Any substance that deforms continuously so long as shear stress is applied
Fluid
Branch of mechanics concerned with the laws controlling the behavior of water and other liquids at rest and in motion
Hydraulics
Deals with geometry of motion of liquids without considering the forces causing that motion
Hydrokinetics
Atmospheric pressure
101 325 Pa
101.325 KPa
A measure of a fluids resistance to shear
Dynamic Viscosity, absolute viscosity or viscosity
The volume per unit of mass of fluid inverse of density
Specific Volume
The earth’s gravitational pull upon a body
Weight
Deals with forces exerted by or upon liquids in motion including relations between velocities and accelerations involved in such fluid motion
Hydrodynamics
Reference density of air density
1.225 kg/m³
Density of mercy
- 13 600 kg/m³
The ratio of the absolute viscosity to density
Kinematic Viscosity
Stefan Boltzmann Formula for Block body radiation
Qe = EQAT⁴
where: E=emissivity
Q=Stefan Boltzmann constant
(5.669x10-⁸ W/m²-K⁴)
Absolute Temperature of the
the surface K
Formula of heat transfer by Convection
q = h(Thot gas-Tsurface)
where:
h- convective heat transfer coefficient (W/m²-K)
Thot gas- temperature of the hot gas
Tsurface- surface temperature
q- heat flux (W/m²)
Formula of Fourier’s Law of Heat conduction
Q = k • A • (T1-T2)/d
Where:
Q- heat transfer rate (W)
k- thermal conductivity of the material (W/m-K)
A- area
T1 and T2- temperature on the two surface
d- thickness of the surface
The fraction of irradiation transmitted by the surface
Transmissivity
May form a lower energy isotope of the same elements or losses enough particles to become a different element altogether
Radioactive Decay (RAD)
Are packs of electromagnetic radiation which sometimes accompanies alpha or beta particles emission
Gamma Rays
The radiation flux living a surface from all direction
Radiosivity
Has a negative charge with very small mass that can be assumed to be zero
Beta Particles
The radiation flux incident on a surface from all direction
Irradiation
Is made up of two protons and two neutrons and has a mass of 4 and charge of +2
Alpha particles
The process at which unstable atoms emits or radiate excess energy in the forms of particles or waves
Radioactive Decay
Are part of electromagnetic spectrum such as light and x-ray but are of much higher energy and much shorter wavelength
Gamma radiation
Abody that absorbs all electromagnetic radiation and absorbs all wavelengths such as no reflection occurs
Black body or reflect black body
The fraction of irradiation absorbed by the surface
Absorptivity
Stefan Boltzmann Constant
5.669x10-⁸ W/m²-K⁴
Conversion of Celsius to Kelvin
Add 273.15
It is sometimes called the mid x point or midpoint is the middle value of the class
Class Mark
General formula of probability
P= no of wanted outcomes/No of possible outcomes
It is the measure or estimation of events are likely to happen
Probability
It is the central value distribution and it divides distribution into two equal parts
Median
It is the value that occurs most frequently in the distribution or the most common among the observation
Mode (Mo)
The total number of experimental units or class
Population
It is the difference between upper and lower boundaries of a class or two successive points
Class interval
It is the sum of all observations divided by their number
Arithmetic mean
A property or characteristics of the population
Parameter
It is the length of an interval which covers the highest and lowest value of the observations
Range
Failing to reject the null hypothesis when it is actually false
Type II
Stefan Boltzmann in calculator
Shift 7 and input 31
