The phrase "a variable velocity" is correct and usable in written English.
It can be used in contexts related to physics, engineering, or any discussion involving motion where the speed of an object changes over time.
Example: "The car accelerated down the highway, reaching a variable velocity as it navigated through traffic."
Alternatives: "a changing speed" or "an adjustable velocity".
clever, though I suppose that could have been a euphemism! had to figure out a good way to write it with a variable velocity).
These solutions cannot be used to investigate contaminant transport in coastal aquifers where seawater intrusion induces a variable velocity field.
A variable velocity scaleUis introduced into the Hermite basis and is shown to yield orders of magnitude reduction in errors, as compared to linear kinetic theory, with no increase in workload.
Analysis available for the vehicle response in a variable velocity run on a non-homogeneously profiled flexible track supported by compliant inertial foundation is for a linear heave model having a single ground input.
More recently, interesting analytic solutions have been obtained by Kumar et al. [31] and Jaiswal and Kumar [32] for the one-dimensional advection-diffusion equation with a variable diffusion coefficient and a variable velocity in both a finite and infinite domain.
Velocity-based algorithms can either use one fixed velocity criterion (e.g., 30°/s; SR Research Eyelink User Manuall, 2005) or have a variable velocity threshold set according to the level of noise in the data (e.g., Behrens et al., 2010).
A stochastic model is developed that gives the probability density of the axial displacement and of the flow-time of a particle with variable velocity in a gas-liquid flow system, such as a bubble column or an airlift loop reactor, where dispersion is dominated by rising bubbles.
The response characteristics evaluation of a vehicle with variable velocity over a rigid, non-homogeneous track is presented.
The dynamic behavior of multi-span non-uniform beams transversed by a moving load at a constant and variable velocity is investigated.
An example of a vehicle moving with variable velocity on a rough surface is considered.
An approximate solution of the problem of linear-quadratic optimal control of the ground-induced vibrations of a vehicle travelling with variable velocity is presented.
