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Everything about Number density
Degree of concentration of countable objects
The number density is an intensive quantity used to describe the degree of concentration of countable objects in physical space: three-dimensional volumetric number density, two-dimensional areal number density, or one-dimensional linear number density. Population density is an example of areal number density. The term number concentration is sometimes used in chemistry for the same quantity, particularly when comparing with other concentrations. Wikipedia →
🧭 Start here: a 6-step reading path
- Read the overview: Number densityA 5-minute orientation
- Skim a recent paper: JWST/MIRI Reveals the True Number Density of Massive Galaxies in the Early UniverseInfluential work since 2022
- Pick up a classic book: Slip-boundary equations for multicomponent nonequilibrium airflowThe most-reprinted book on the subject
- Read the landmark paper: Schmidt number for density matricesCited 362 times
- Go sideways: Volumetric heat capacityA closely related topic
- Go sideways: DiffusionA closely related topic
📖 Definitions
Noun the number of particles per unit volume
🗂️ The subject at a glance
🏆 Landmark papers (most cited)
Schmidt number for density matrices
Increased Small Low-Density Lipoprotein Particle Number
Texture density adaptation and visual number revisited
Particle-number projection and the density functional theory
Fabricating Planar Nanoparticle Assemblies with Number Density Gradients
Finite number density corrections to leptogenesis
Density matrix from photon number tomography
Baryon number fluctuations at finite temperature and density
🆕 Influential since 2022
JWST/MIRI Reveals the True Number Density of Massive Galaxies in the Early Universe
Number Density Interpretation of Dihadron Fragmentation Functions
Holographic study of higher-order baryon number susceptibilities at finite temperature and density
Quantum-Enhanced Magnetometry at Optimal Number Density
Polyradical character assessment using multireference calculations and comparison with density-functional derived fractional occupation number weighted density analysis
📚 Books worth reading
- 📕Slip-boundary equations for multicomponent nonequilibrium airflowRoop N. Gupta · 1985
- 📕The effects of pure density evolution on the brightness distribution of cosmological gamma-ray burstsJohn M. Horack · 1995
Analytic number theoryJ. M. de Koninck · 2012
Geometry and Dynamics in Gromov Hyperbolic Metric SpacesTushar Das, David Simmons · 2017
Ranked by number of editions on Open Library, a rough measure of how lasting a book is.
🔗 Related topics
- Volumetric heat capacity The volumetric heat capacity of a material is the heat capacity of a sample of the substance divided by the volume of the sample. It is the amount of energy…
- Diffusion Diffusion is the net movement of anything (for example, atoms, ions, molecules, energy) generally from a region of higher concentration to a region of…
- Molar heat capacity The molar heat capacity of a chemical substance is the amount of energy that must be added, in the form of heat, to one mole of the substance in order…
- Knudsen number The Knudsen number (Kn) is a dimensionless number defined as the ratio of the molecular mean free path length to a representative physical length scale…
- Defining equation (physical chemistry) In physical chemistry, there are numerous quantities associated with chemical compounds and reactions; notably in terms of amounts of substance, activity…
- Molar concentration Molar concentration (also called amount-of-substance concentration or molarity) is the number of moles of solute per liter of solution. Specifically, it…
- Volume (thermodynamics) In thermodynamics, the volume of a system is an important extensive parameter for describing its thermodynamic state. The specific volume, an intensive…
- Mass diffusivity Diffusivity, mass diffusivity or diffusion coefficient is usually written as the proportionality constant between the molar flux due to molecular diffusion…