Thermodynamic & Transport Processes

← Back to Domain-Specific Families

Abstractions about energy and matter transport across physical, chemical, and biological systems, covering thermodynamic cycles and laws (heat engines, critical points, endothermic processes), flow phenomena (plug flow, diffusion, drainage systems), and process-specific mechanisms like fermentation and dewetting.

34 abstractions in this family — domain-specific abstractions that sit near one another in structural-signature space (k-means over structural-signature embeddings). Each is shown with its short description.

• Activation Energy Asymptotics — A singular-perturbation method that uses large Arrhenius activation energy to separate thin reaction zones from transport regions and match their solutions.
• Bagnold formula — An aeolian-transport law making dry steady sand mass flux scale approximately with the cube of above-threshold friction velocity, adjusted for air, gravity, and grain size.
• Capillary Electrochromatography — A capillary separation method in which high voltage drives electroosmotic flow through a chromatographic stationary phase and analytes separate through combined electrophoretic mobility and partitioning.
• Cell unroofing — A preparation approach that selectively exposes the cytoplasmic face of adherent plasma-membrane sheets while preserving chosen membrane and cortical organization for in situ analysis.
• Convective Overturn — Buoyancy-driven circulation behind a stalled core-collapse supernova shock that moves neutrino-heated matter outward and cooler accreting matter inward, potentially aiding shock revival.
• Cooling — Net reduction of a defined system's thermal energy, temperature, or lower-energy phase state through heat transfer or work-driven removal.
• Critical point (thermodynamics) — A thermodynamic state where a phase-coexistence curve terminates, the two phases lose their macroscopic distinction, and critical fluctuations emerge.
• De Laval Nozzle — A converging–diverging nozzle that chokes compressible flow at its throat and accelerates it supersonically in the divergent section under suitable pressure ratio.
• Dewetting — The withdrawal and breakup of a film from a substrate or adjoining phase as interfacial energetics favor reduced coverage over continued wetting.
• Drainage system (geomorphology) — The connected pattern of streams, rivers, and lakes draining a basin, shaped by topography, rock structure, gradient, and landscape history.
• Endothermic Process — A physical or chemical process that absorbs heat from its surroundings under the stated boundary conditions, giving the system a positive heat input and, at constant pressure, a positive enthalpy change.
• Energy Transition — A sustained structural change in energy sources, conversion, infrastructure, end uses, demand, and institutions across a defined energy system.
• Fermentation — A mode of energy-yielding catabolism in which cells balance redox by transferring electrons among organic metabolites, generating ATP chiefly by substrate-level phosphorylation and producing reduced organic end products without an external respiratory electron acceptor.
• FFC Cambridge Process — A molten-salt electrochemical reduction method that converts a solid metal oxide cathode directly toward metal by removing oxygen ions through a calcium-chloride electrolyte.
• Heat Engine — A cyclic system that absorbs heat from a hot source, converts part into work through a working substance, and rejects the rest to a colder sink under second-law limits.
• Lactate shuttle hypothesis — A metabolic framework in which lactate produced at one cellular, tissue, or organ site is transported to another for oxidation, gluconeogenesis, or signaling-associated use.
• Laws of thermodynamics — The four foundational thermodynamic laws relating equilibrium and temperature, conservation of energy, entropy and process direction, and the limiting behavior of entropy near absolute zero.
• Liquid-Phase Coalescence — Liquid-phase coalescence joins initially separate regions of the same liquid phase through an interfacial bridge after a separating film or gap fails.
• Microrheology — A rheological measurement method that infers local viscoelastic response from the thermally driven or externally forced motion of microscopic tracer particles embedded in a material.
• Nonvolatile Acid — An acid load that cannot be eliminated as pulmonary carbon dioxide and must instead be metabolized, buffered, or removed chiefly through renal net acid excretion.
• Open-Channel Flow — Liquid flow in a channel or partly filled conduit with an exposed free surface, so depth and surface behavior are governed chiefly by gravity, inertia, viscosity, geometry, and boundary conditions.
• Phase-Change Memory — Nonvolatile memory that stores data in electrically programmed amorphous and crystalline material states distinguished by resistance.
• Planetary Habitability — The evidence-bounded capacity of a planet or natural satellite to maintain environments compatible with a specified form and duration of life, without implying that life is present.
• Plug flow — An ideal flow model with uniform cross-sectional state and velocity, convective axial advance, and negligible back-mixing, yielding ordered material slices and one-dimensional evolution from inlet to outlet.
• Pouillet Effect — Heat associated with liquid wetting of a dry porous or divided solid, usually released as interfaces form.
• Reduction Potential — A reference-relative electrode potential quantifying a redox couple's tendency to accept electrons under declared chemical and thermodynamic conditions.
• Regenerative Heat Exchanger — A heat exchanger that stores heat temporarily in a matrix exposed successively to hot and cold flows.
• Reverse Diffusion — Uphill transport in which a component moves toward higher concentration during an unstable or coupled mixture evolution because the chemical-potential gradient, rather than concentration gradient alone, drives flux.
• Shock-Capturing Method — A conservative numerical method that captures shocks within a fixed computational grid using flux discretization and controlled dissipation rather than explicitly tracking shock surfaces.
• Soil–Plant–Atmosphere Continuum — The physically connected pathway through which water moves from soil, across roots and plant vascular tissues, through leaves, and into the atmosphere along coupled water-potential gradients.
• Synthetic Organelle — An engineered intracellular compartment that localizes, protects, and controls a defined biochemical function in analogy with a natural organelle.
• Thermodynamic System — A declared macroscopic region or body separated from its surroundings by a boundary whose permitted matter and energy transfers determine thermodynamic accounting and system class.
• Thermogravitational Cycle — A thermodynamic cycle using weight, buoyancy, and hydrostatic pressure to compress and expand a working fluid between heat reservoirs.
• Trapping Mechanisms for Carbon Geosequestration — Physical and chemical processes that retain injected carbon dioxide underground through sealing, capillary immobilization, dissolution, or mineral fixation.