Notes in Fluid Quals

To Subscribe, use this Key

Status	Last Update	Fields
Published	08/18/2023	Four classes of fluid properties + examples of each
Published	08/18/2023	Eulerian vs. Lagrangian viewpoints
Published	08/18/2023	Solenoidal vector field and implication on vorticity
Published	08/18/2023	Viscosity
Published	08/18/2023	Effect of pressure and temperature on viscosity
Published	08/18/2023	When does the no-slip condition fail?
Published	08/18/2023	Why is symmetry required for the stress tensor?
Published	08/18/2023	Dynamic coefficient of viscosity vs bulk viscosity
Published	08/18/2023	Nusselt number
Published	08/18/2023	Knudsen number
Published	08/18/2023	For surface forces, when is mechanical pressure and thermodynamic pressure the same?
Published	08/18/2023	Dynamic viscosity vs kinematic viscosity
Published	08/18/2023	Pressure
Published	08/18/2023	What are the basic sources of aerodynamic forces/moments?
Published	08/18/2023	Pressure Coefficient (Cp)
Published	08/18/2023	Skin friction coefficient
Published	08/18/2023	What is the general process for finding aerodynamic forces/moments over a body
Published	08/18/2023	Buckingham Pi Theorem
Published	08/18/2023	Conditions for flow to be dynamically similar
Published	08/18/2023	Mean free path
Published	08/18/2023	Continuum Flow vs. Free Molecular Flow
Published	08/18/2023	Viscous vs Inviscid Flow
Published	08/18/2023	How can BL separation be modeled by inviscid theory?
Published	08/18/2023	When does shear stress occur?
Published	08/18/2023	How does pressure vary through the boundary layer and what are the implications?
Published	08/18/2023	Aerodynamic heating
Published	08/18/2023	For an airfoil, how does coefficient of lift compare to coefficient of drag
Published	08/18/2023	What do divergence and curl of a vector physically represent?
Published	08/18/2023	Physical meaning of divergence of velocity
Published	08/18/2023	Continuity equation in words
Published	08/18/2023	Momentum equation (fluids) in words
Published	08/18/2023	Hydrostatic equation
Published	08/18/2023	Buoyancy force
Published	08/18/2023	How do you close the energy equation? Why is it unclosed in the first place?
Published	08/18/2023	Pathline
Published	08/18/2023	Streamline
Published	08/18/2023	Streakline
Published	08/18/2023	When are streamlines, pathlines, and streaklines the same?
Published	08/18/2023	Vorticity
Published	08/18/2023	Can Bernoulli's apply to any two points in a flow?
Published	08/18/2023	Physical implications of Bernoulli equation
Published	08/18/2023	What is Laplace's equation?
Published	08/18/2023	T/F: The stream function automatically satisfies continuity
Published	08/18/2023	D'Alembert's Paradox
Published	08/18/2023	Why can you add the stream function and velocity potential solutions for elementary flows?
Published	08/18/2023	Four kinds of deformation
Published	08/18/2023	What happens to the stress and strain-rate tensor along the principal axes?
Published	08/18/2023	T/F: incompressible implies constant density
Published	08/18/2023	Why do we need Stoke's hypothesis?
Published	08/18/2023	Poiseuille Flow
Published	08/18/2023	Why can't you analytically solve the N-S equations?
Published	08/18/2023	Viscous dissipation (BL context)
Published	08/18/2023	Vorticity transport equationa) What does each term represent b) When are they 0?
Published	08/18/2023	Cartesian Continuity Equation (Tensor)
Published	08/18/2023	Cartesian Continuity Equation (Vector)
Published	08/18/2023	Cartesian Continuity Equation Nonconservation Form (Vector)
Published	08/18/2023	Cartesian Continuity Equation (integral)
Published	08/18/2023	Velocity Potential Function
Published	08/18/2023	Reynolds numbera) Turbulence interpretation
Published	08/18/2023	Cartesian Momentum Equation (Tensor)
Published	08/18/2023	Cartesian Momentum Equation (Integral)
Published	08/18/2023	Momentum Equation (Vector)
Published	08/18/2023	Stoke's Hypothesis
Published	08/18/2023	Cartesian vorticity vector
Published	08/18/2023	Prandtl number
Published	08/18/2023	Viscous stressesA) deviatoric part and meaning
Published	08/18/2023	Dilatation rate
Published	08/18/2023	Fourier's law of heat conduction
Published	08/18/2023	Suddenly accelerated flat plate
Published	08/18/2023	Circulation
Published	08/18/2023	Polar 2D stream function
Published	08/18/2023	Bernoulli's equation (list assumptions and basic derivation)
Published	08/18/2023	Cartesian 2D streamline/stream function and physical significance of deltaPsi
Published	08/18/2023	Mathematical implications of constant density
Published	08/18/2023	Coefficient of viscosity
Published	08/18/2023	Mathematical description of each deformation
Published	08/18/2023	Strain rate tensorA) strain rateB) rotation rate
Published	08/18/2023	Flow between infinite parallel platesA) governing equationB) general solution
Published	08/18/2023	Curvilinear coordinatesA) cylindricalB) polar
Published	08/18/2023	Curvilinear vector operators
Published	08/18/2023	Material derivative
Published	08/18/2023	Pressure contribution to surface forces
Published	08/18/2023	Stress tensor
Published	08/18/2023	Physical implication of del dot u = 0
Published	08/18/2023	Conditions and applications for Stoke's flow
Published	08/18/2023	Kinematic reversibility and when does it usually hold?
Published	08/18/2023	What is the difference between the Euler eqns and N-S equations
Published	08/18/2023	The velocity distribution of fully developed laminar pipe flow is a {{c1::paraboloid}}
Published	08/18/2023	Stoke's flow N-S simplifications
Published	08/18/2023	Stoke's drag law
Published	08/18/2023	What is a practical method to measure viscosity?
Published	08/18/2023	Cylindrical N-S r Momentum
Published	08/18/2023	Cylindrical N-S z Momentum
Published	08/18/2023	Cylindrical N-S \(\theta\)-Momentum
Published	08/18/2023	How to check that a flow can be characterized as a creeping flow?
Published	08/18/2023	RTT
Published	08/18/2023	99% BL thickness and issues (if any)
Published	08/18/2023	How to determine when a BL separates mathematically?
Published	08/18/2023	2D, constant density, laminar BL equationsa) Assumptionsb) In general how to get there
Published	08/18/2023	Incompressible BL thicknessa) displacementb) momentum
Published	08/18/2023	Cylindrical N-S continuity
Published	08/18/2023	Blasius BL Similarity EqnA) velocity componentsB) thickness estimationsC) BCsD) Stream functionE) Similarity variable
Published	08/18/2023	Adverse pressure gradient and separated flow
Published	08/18/2023	Momentum integral equation
Published	08/18/2023	For a plane jet, is mass and momentum conserved? Why/why not?
Published	08/18/2023	BL wall shear stress and how to find total drag from it
Published	08/18/2023	Internal energy equation
Published	08/18/2023	Enthalpy equation and meaning for each term
Published	08/18/2023	Eckert number
Published	08/18/2023	Total energy equation and meaning of each term
Published	08/18/2023	Forced convection vs free convection and when they both occur
Published	08/18/2023	How do the thermal BL thickness and velocity BL thickness compare? Which is bigger at air standard conditions?
Published	08/18/2023	Recovery factory and what is the recovery factor for Pr = 1
Published	08/18/2023	Adiabatic wall mathematical condition
Published	08/18/2023	How would you calculate adiabatic wall temperature?
Published	08/18/2023	Reynolds analogy; key issue/limitations
Published	08/18/2023	Stagnation Point (Hiemenz) Flow solution stepsREDO THIS CARD TO MAKE IT BETTER
Published	08/18/2023	What are these equations and does each term mean and what is C?
Published	08/18/2023	2D compressible BL eqns and simplifications that led to the final result
Published	08/18/2023	What are physical differences between the incompressible and compressible BL? How does that affect the solution procedure?
Published	08/18/2023	How do you find the thermal BL equations (including stagnation)? How does it simplify if Pr = 1?
Published	08/18/2023	What is this equation  and what does each term mean?
Published	08/18/2023	Couette flow
Published	08/18/2023	BL over a flat plate key physical features and what do you actually need to find the solution?
Published	08/18/2023	Pressure gradient effect on laminar BL shape
Published	08/18/2023	Analysis of flow over circular cylinder
Published	08/18/2023	T/F: 3D disturbances are more de-stabilizing than 2D
Published	08/18/2023	Velocity perturbation equations and steps on how to derive
Published	08/18/2023	Do 2D disturbances satisfy continuity?
Published	08/18/2023	How do you define when a 2D periodic disturbance in time is stable or unstable? What about spatially?
Published	08/18/2023	Rayleigh 1880 instability theory
Published	08/18/2023	Fjortoft 1950 instability theory
Published	08/18/2023	What is the plot showing and why is the left stable and the right unstable?
Published	08/18/2023	Draw and label major features of neutral stability curve with key observations
Published	08/18/2023	In general, does viscosity surpress and exacerbate disturbance? Any other effects?
Published	08/18/2023	What are some of the known mechanisms that make a flow less stable?
Published	08/18/2023	What additional considerations are required in the compressible boundary layer calculations?
Published	08/18/2023	Basic characteristics of turbulence
Published	08/18/2023	Prandtl BL theory assumptions
Published	08/18/2023	Where do the BL equations not apply on a flat plate?
Published	08/18/2023	BL large Reynolds allows us to make what simplifcations/assumptions
Published	08/18/2023	How/why do free shear flows follow the flate-plate boundary layer equations? What are additional simplifications you can make to the BL equations?
Published	08/18/2023	Plane laminar jeta) Assumptionsb) Equation to solvec) General stepsd) BCse) General form of solutionMAKE B AND C BETTER
Published	08/18/2023	Plane laminar wakea) Assumptionsb) Equation to solvec) General stepsd) BCse) General form of solution
Published	08/18/2023	What is BL separation, key features and what causes it?
Published	08/18/2023	Explain the separation of a BL behind a cylinder (or other blunt body)
Published	08/18/2023	What sets the size of the large and small scales in turbulence?
Published	08/18/2023	Does a laminar or turbulent BL grow faster?
Published	08/18/2023	Dimensions vs units
Published	08/18/2023	Kolmogorov scalea) lengthb) timec) velocity
Published	08/18/2023	How is the interaction between large and small scales represented in the NS equations for turbulence?
Published	08/18/2023	How is energy transferred between scales in turbulence?
Published	08/18/2023	How much energy is transferred per unit time across turbulence scales? In order words: how does dissipation rate scale?
Published	08/18/2023	What does a higher turbulent Re imply about the length scales of the flow? What about time scales?
Published	08/18/2023	How do the range of turbulence time scales compare to that of the range length scales?
Published	08/18/2023	What are the different modes of averaging?
Published	08/18/2023	Rules of averaginga) Avg of fluctuationb) Avg of sumc) Avg of multiplication by a constantd) Avg of derivativee) Avg of a product
Published	08/18/2023	Covariance between two instantaneous random variables and its properties
Published	08/18/2023	Correlation coefficient between two instantaneous random variables + properties of coefficient
Published	08/18/2023	Compressible BL similarity transformation variables
Published	08/18/2023	How does the local friction coefficient scale with Reynolds number for the Blasius solution? What about total drag or the drag coefficient?
Published	08/18/2023	How does the skin friction scaling with Reynolds number for flow over a flat plate change for the incompressible vs compressible BL?
Published	08/18/2023	Effects of temperature, freestream Mach number, wall temperature on a compressible BL
Published	08/18/2023	RANS (continuity and momentum)
Published	08/18/2023	Reynolds stress tensora) Diagonal and off-diagonal component interpretation
Published	08/18/2023	What makes the RANS equations difficult to solve?
Published	08/18/2023	What is an alternative to RANS?
Published	08/18/2023	Direct numerical simulation (DNS)
Published	08/18/2023	How does the number of grid points scale with Reynolds number for DNS?
Published	08/18/2023	Most common methods of BL control
Published	08/18/2023	Does a similarity solution still hold for suction on a flat plate?
Published	08/18/2023	Viscous dissipation of turbulent kinetic energy is the dominant process at the {{c1::small}} scales
Published	08/18/2023	Mean flow KE equation and each term meaning
Published	08/18/2023	Orr-Sommerfeld equation
Published	08/18/2023	What affect does high Reynolds number have on the mean flow KE equation? What about momemtum equation?
Published	08/18/2023	What is turbulence kinetic energy physically? What is the TKE equation describing?
Published	08/18/2023	TKE equation and each term meaning
Published	08/18/2023	Describe the process of transition from laminar to turbulence in a boundary layer on a flat plate
Published	08/18/2023	How does pressure gradient affect stability of BL flow over a flat plate?
Published	08/18/2023	Effect of suction on the BL
Published	08/18/2023	Is a thinner BL less or more prone to becoming turbulent? Why?
Published	08/18/2023	How does heat transfer affect instability in BL flow?
Published	08/18/2023	How does roughness affect transition and stability in a BL?
Published	08/18/2023	TKE budget
Published	08/18/2023	Statistically stationary turbulence
Published	08/18/2023	Homogenous turbulence
Published	08/18/2023	Isotropic turbulencea) Implications from rotationsb) Implications from relfection
Published	08/18/2023	What is the Reynolds stress tensor for isotropic turbulence?
Published	08/18/2023	Can you have mean velocity gradients in homogenous turbulence? What about isotropic?
Published	08/18/2023	Is isotropic turbulence homogoneous?
Published	08/18/2023	Explain small-scale universality
Published	08/18/2023	How do you derive the TKE equation?
Published	08/18/2023	What are the implications of assuming local isotropy on the dissipation rate?
Published	08/18/2023	Taylor scalea) How does it scale with Reynold's number?b) Why does it matter?c) What does it represent?
Published	08/18/2023	What is the simplest turbulent flow possible? Does does the TKE equation reduce for that situation? What are some physical features?
Published	08/18/2023	What is the difference between and viscous and inviscid instabilities?
Published	08/18/2023	How fast does KE grow in isotropic, stationary turbulence? What is physically happening to explain this?
Published	08/18/2023	How does isotropic turbulence affect the range of scales in turbulence?
Published	08/18/2023	If in isotropic turbulence, the turbulence is decaying; how do we maintain it in the laboratory or in experiments so that we can actually investigate …
Published	08/18/2023	Kolmogorov 1941
Status	Last Update	Fields