# Rheology Vocabulary

Maintained term list. Feeds BM25 keyword expansion (v0.5) and prompt context.

## Core rheological quantities

- viscosity, dynamic viscosity, kinematic viscosity
- shear rate, shear stress, normal stress, normal stress difference
- storage modulus G', loss modulus G'', complex modulus G*
- loss tangent tan(delta), phase angle
- viscoelasticity, linear viscoelastic regime (LVR)
- creep, creep compliance, stress relaxation
- relaxation time, relaxation spectrum, retardation time
- yield stress, static yield stress, dynamic yield stress
- flow curve, Newtonian plateau, non-Newtonian

## Flow behavior

- shear thinning, shear thickening
- discontinuous shear thickening (DST), continuous shear thickening (CST)
- thixotropy, rheopexy, anti-thixotropy
- jamming, jamming transition
- plug flow, slip, wall slip
- steady-state flow, transient flow, startup flow, cessation of flow

## Constitutive models

- Maxwell model, Kelvin-Voigt model, Jeffreys model
- Oldroyd-B, Giesekus, FENE-P
- Bingham model, Herschel-Bulkley, Casson model
- Cross model, Carreau model, Bird-Carreau
- Doi-Edwards, reptation

## Suspension and colloidal systems

- hard-sphere suspension, charged colloid
- volume fraction phi, packing fraction
- Peclet number (Pe), Stokes number
- hydrodynamic interactions, lubrication force
- frictional contact, frictionless contact
- microstructure, pair distribution function g(r)
- colloidal gel, arrested state, percolation
- depletion interaction, depletion flocculation
- DLVO theory, electrostatic double layer
- Hamaker constant, van der Waals force

## Microrheology

- passive microrheology, active microrheology
- mean squared displacement (MSD)
- generalized Stokes-Einstein relation (GSER)
- one-point microrheology, two-point microrheology
- optical tweezers, magnetic tweezers
- diffusing wave spectroscopy (DWS), dynamic light scattering (DLS)
- tracer particle, probe particle

## Experimental techniques

- rotational rheometer, cone-and-plate, parallel plate
- Couette geometry, Taylor-Couette flow
- capillary rheometer, slit rheometer
- small-amplitude oscillatory shear (SAOS), large-amplitude oscillatory shear (LAOS)
- strain sweep, frequency sweep, temperature sweep
- rheo-NMR, rheo-SANS, rheo-SAXS, rheo-microscopy
- particle image velocimetry (PIV), confocal microscopy

## Polymer rheology

- entanglement, entanglement molecular weight Me
- Rouse model, Zimm model, reptation, tube model
- plateau modulus GN0, terminal relaxation
- polydispersity, molecular weight distribution
- star polymer, ring polymer, branched polymer

## Interfacial and emulsion rheology

- interfacial rheology, surface viscosity, surface elasticity
- Marangoni effect, surfactant
- emulsion, droplet size distribution, coalescence
- Pickering emulsion, particle-stabilized emulsion
- foam, foam drainage, bubble coarsening

## Active and biological matter

- active matter, self-propulsion, motility
- active gel, cytoskeletal network
- biopolymer, actin, microtubule, collagen
- cell mechanics, extracellular matrix (ECM)

## Friction and contact mechanics

- lubrication-to-friction transition, shear jamming, Wyart-Cates model
- sliding friction, rolling friction, sticky friction, dynamic bonds
- surface roughness, asperity, contact mechanics
- tribology, nanotribology, lateral force microscopy, colloidal probe

## Data-driven rheology

- machine learning, neural network, physics-informed neural network (PINN)
- rheology-informed neural network (RhINN), symbolic regression
- constitutive model discovery, surrogate model, Gaussian process
- graph neural network, Bayesian inference

## LLMs and retrieval

- large language model (LLM), small language model, open-weight model, local model
- Ollama, quantization, context window, num_ctx
- retrieval-augmented generation (RAG), dense retrieval, BM25, hybrid retrieval
- cross-encoder, re-ranking, embedding, semantic search
- structured output, JSON schema, schema drift, hallucination, grounding, citation
- AI tutor, chatbot, generative AI, physics education, engineering education