# Dimensionless

### Some articles on dimensionless:

Similitude (model) - Typical Applications
... See also List of dimensionless numbers Similitude has been well documented for a large number of engineering problems and is the basis of many textbook formulas and dimensionless ... Some common applications of similitude and associated dimensionless numbers Incompressible flow (see example above)– Reynolds number, Pressure coefficient, (Froude number and Weber number for open channel hydraulics ...
Examples of Physical Coefficients
... Coefficient of thermal expansion (thermodynamics) (dimensionless) - Relates the change in temperature to the change in a material's dimensions ... Lift coefficient (CL or CZ) (aerodynamics) (dimensionless) - Relates the lift generated by an airfoil with the dynamic pressure of the fluid flow around the ... Transmission coefficient (quantum mechanics) (dimensionless) - Represents the probability flux of a transmitted wave relative to that of an incident wave ...
Activity (chemistry) - Definition - Activity Coefficient
... The activity coefficient γ, which is also a dimensionless quantity, relates the activity to a measured amount fraction xi, molality bi or amount concentration ci The division by the standard molality bo or the ... these cases, the activity can be substituted with the appropriate dimensionless measure of composition xi, mi/mo or ci/co ...
Maxwell Material - Dynamic Modulus
... Blue curve dimensionless elastic modulus Pink curve dimensionless modulus of losses Yellow curve dimensionless apparent viscosity X-axis dimensionless frequency ...
Keq - Types of Equilibrium Constants - Gas Phase Equilibria
... so it must be divided by a standard pressure, usually 1 bar, in order to produce a dimensionless quantity, f / p ... An equilibrium constant is expressed in terms of the dimensionless quantity ... example, for the equilibrium 2NO2 N2O4, Fugacity is related to partial pressure, p, by a dimensionless fugacity coefficient ϕ f = ϕ p ...