diffusivity
How substances disperse
Diffusivity measures how quickly something spreads through a medium—heat through metal, molecules through liquid, particles through air.
The term appears in physics and engineering contexts: thermal diffusivity, mass diffusivity.
Higher diffusivity means faster spreading.
The concept underlies calculations in heat transfer, fluid dynamics, and materials science.
Process of spreading throughout
- osmosisSolvent crossing semipermeable barrier
- selectivityTendency to choose carefully
- semipermeableAllowing partial passage
- membraneThin tissue sheet
transport · barrier · dialysis · filtration · pores · penetration · transdermal · bioavailability
Describing random particle motion
- kineticsScience of motion forces
- collisionForceful contact between objects
- mobilityCapacity for movement
- randomnessLack of predictable pattern
concentration · gradient · intermolecular · solute · solvent · viscosity · flux · tracer
Violently agitated or disturbed
- laminarArranged in thin layers
- flowUnbroken forward movement
- eddyCircular counter-current
- vortexRotating fluid column
convection · Reynolds · advection · mixing · dispersion · hydrodynamics · streamline · buoyancy
Void space density
- permeabilityAbility to transmit fluids
- conductivityAbility to carry current
- compositeMade of distinct parts
- polymerLarge repeated-unit molecule
alloy · semiconductor · coating · sintering · microstructure · anisotropy · homogeneous · heterogeneous
Transferred thermal energy
- conductionHeat transfer through contact
- temperatureMeasured heat intensity
- gradientRate of change across space
- latticeOpenwork of crossed strips
entropy · insulation · amorphous · crystalline · annealing · steady-state · transient
Study of light-matter interaction
- chromatographyTechnique separating mixtures by differential migration
- calorimetryMeasuring heat in reactions
- gravimetryMeasuring gravitational field strength
- analyticalExamining parts methodically
precision · quantitative · fluorescence · interferometry · electrochemical · impedance
permeation
Process of spreading throughout
- osmosisSolvent crossing semipermeable barrier
- selectivityTendency to choose carefully
- semipermeableAllowing partial passage
membrane · transport · barrier · dialysis · filtration · pores · penetration · transdermal · bioavailability · aquaporin
Brownian
Describing random particle motion
- kineticsScience of motion forces
- collisionForceful contact between objects
- mobilityCapacity for movement
randomness · concentration · gradient · intermolecular · solute · solvent · viscosity · flux · tracer
turbulent
Violently agitated or disturbed
vortex · convection · Reynolds · advection · mixing · dispersion · hydrodynamics · streamline · buoyancy · stratification
porosity
Void space density
- permeabilityAbility to transmit fluids
- conductivityAbility to carry current
- compositeMade of distinct parts
polymer · alloy · semiconductor · coating · sintering · microstructure · anisotropy · homogeneous · heterogeneous · substrate
heat
Transferred thermal energy
- conductionHeat transfer through contact
- temperatureMeasured heat intensity
- gradientRate of change across space
lattice · entropy · insulation · amorphous · crystalline · annealing · steady-state · transient
spectroscopy
Study of light-matter interaction
- chromatographyTechnique separating mixtures by differential migration
- calorimetryMeasuring heat in reactions
- gravimetryMeasuring gravitational field strength
analytical · precision · quantitative · fluorescence · interferometry · electrochemical · impedance
diffusivityconfinement
State of being restricted
impermeability · concentration · accumulation · aggregation · localization
- thermal diffusivityHeat transfer rate coefficient
diffuse, infusion, effusive, diffusion, profusion, diffused, diffuses, diffusing, transfusion