Dimensionless Numbers in Transport
The ratio of inertial to viscous forces, the value of which determines flow regime. Encountered in CEN 333, 341, 311, 442.
What is the Reynold's number?
A process in which there is no heat transfer.
What is an adiabatic process?
A formalized method to determine if a process flow calculation is solvable by systematically counting variables and independent equations.
What is Degree of Freedom (DOF) Analysis?
A mathematical theorem that allows evaluating limits of indeterminate forms using derivatives.
What is L'Hopital's Rule?
What is an (Bronsted-Lowry) acid?
Frequently used in pressure drop correlations, this can be read from a Moody diagram when Reynold’s number and pipe relative roughness are known. Encountered in CEN 333, 442.
What is the friction factor (f)?
A model that relates pressure, volume, and temperature of a substance in a particular phase.
What is an Equation of State (EOS)?
The fraction of reactant masses that is converted into a desired product.
What is the atom economy?
When applied to physics, the integral of acceleration.
What is velocity?
In the original form of chemistry (alchemy), these were the 4 elements.
What are fire, water, air, and earth?
The ratio of the resistance to conduction in a solid to the resistance to convection to a fluid surrounding the solid. Encountered in CEN 311, 341.
What is the Biot number (Bi)?
A model for VLE in which the reference for an ideal solution is infinite dilution.
What is Henry’s Law?
A function whose value depends upon how you got from an initial to final state.
What is a non-state (or path) function (or variable)?
A certain kind of approximation of an integral by a finite sum, typically using shapes and evaluating area of these shapes.
This type of bond is typically found in the non-metal section of the periodic table.
What is a covalent bond?
The ratio of convection to pure conduction heat transfer, models of this group are frequently used to calculate convection heat transfer coefficients (h). Encountered in CEN 341, 442.
What is the Nusselt number (Nu)?
A property that quantifies deviation from ideal solution (pure substance reference) behavior in a mixture at VLE
What is the (liquid) activity coefficient?
The energy a system possesses because of its molecular structure, molecular interactions, and molecular thermal motion.
What is internal energy (U)?
What is 1/(1+x2)?
This process can be observed from dry ice.
What is sublimation?
This ratio of the momentum diffusivity to the thermal diffusivity can also be written as Cpμ/k. Encountered in CEN 341, 442.
What is the Prandtl number (Pr)?
The difference between ideal gas properties and real gas properties such as enthalpy, entropy, volume and Gibb’s free energy, at the same temperature and pressure.
What are residuals or residual properties (aka departure functions)?
A measure of “how much reaction,” it is defined as the rate of reactant consumption or product production divided by its stoichiometric coefficient.
What is the extent of reaction?
Given a vector field, the theorem relates the integral of the curl of the vector field over some surface, to the line integral of the vector field around the boundary of the surface.
What is Stoke's theorem?
What is 1015?