Adiabatic heating definition of Adiabatic heating in the Free Online Encyclopedia.

adiabatic process [¦ad·ē·ə¦bad·ik prä·səs]

(thermodynamics)

Any thermodynamic procedure which takes place in a system without the exchange of heat with the surroundings.

Adiabatic process

A thermodynamic process in which the system undergoing the change exchanges no heat with its surroundings. An increase in entropy or degree of disorder occurs during an irreversible adiabatic process. However, reversible adiabatic processes are isentropic; that is, they take place with no change in entropy. In an adiabatic process, compression always results in warming, and expansion always results in cooling. See Entropy, Isentropic process

During an adiabatic process, temperature changes are due to internal system fluctuations. For example, the events inside an engine cylinder are nearly adiabatic because the wide fluctuations in temperature take place rapidly, compared to the speed with which the cylinder surfaces can conduct heat. Similarly, fluid flow through a nozzle may be so rapid that negligible exchange of heat between fluid and nozzle takes place. The compressions and rarefactions of a sound wave are rapid enough to be considered adiabatic. See Sound, Thermodynamic processes

Adiabatic Process

a process, occurring in a physical system, in which no heat is exchanged with the surroundings. An adiabatic process can occur in a system surrounded by a heat-insulating (adiabatic) enclosure. One such example is the power stroke of a heat engine, where the gas or vapor expands in a cylinder with heat-insulating walls and piston, in the absence of irreversible conversion of friction into heat.

An adiabatic process can also be achieved in the absence of an adiabatic enclosure. In that case, the process must occur so rapidly that there is no time for any exchange of heat between the system and its surroundings. That happens, for example, when a gas is compressed by a shock wave, where the gas, having no time to give off the heat released, heats up vigorously. When the wave moves at a speed of about 1 km/sec (a speed attained by modern supersonic airplanes) and compresses the air fourfold, the air temperature rises to 700°C. Adiabatic expansion of the gas with the carrying out of work against external forces and the forces of mutual molecular attraction causes the gas to cool. This method of cooling gases is the basis of the gas liquefaction process. The adiabatic process of demagnetization of paramagnetic salts makes it possible to attain temperatures close to absolute zero.

An adiabatic process can be either reversible or irreversible. In the case of the reversible adiabatic process, the entropy of the system remains constant. A reversible adiabatic process is therefore called isoentropic. On a phase diagram of the system it is represented by an adiabatic curve or by an isoentropic curve. In an irreversible adiabatic process the entropy increases.

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No references found	Hillmansen (7) demonstrated, by increasing the crosshead speed in a series of dog-bone tensile tests, that adiabatic heating eventually destabilized drawing. Uniaxial tensile properties underlying plane-stress rapid fracture ... by Ozbek, Pemra; Leevers, Patrick / Polymer Engineering and Science Applying high hydrostatic pressure on a commercial basis to inactivate bacterial spores requires a knowledge of pressure-induced adiabatic heating and an understanding of the potential interactive synergistic effects on ionic and other equilibria in the end product and on the target organisms themselves. High hydrostatic pressure by Microbial Update International p] with further increases in test speed may have reflected a local increase in matrix mobility linked to adiabatic heating (24), a 50 K increase in temperature being observed ahead of the crack tip at speeds of 0. Essential work of fracture of polypropylene and polypropylene blends ... by Grein, C.; Plummer, C.J.G.; Germain, Y.; Kausch, H.-H.; Beguelin, P. / Polymer Engineering and Science	adhesive tape Adhesives Adi Granth adiabat adiabatic adiabatic approximation adiabatic atmosphere adiabatic calorimeter adiabatic chart adiabatic compression adiabatic condensation pressure adiabatic condensation temperature adiabatic cooling adiabatic curing Adiabatic Curve adiabatic demagnetization adiabatic ellipse adiabatic engine adiabatic envelope adiabatic equilibrium adiabatic equivalent temperature adiabatic expansion adiabatic extrusion adiabatic flame temperature adiabatic flow Adiabatic heating adiabatic invariant adiabatic lapse rate adiabatic law Adiabatic Process adiabatic rate adiabatic recovery temperature adiabatic saturation pressure adiabatic saturation temperature adiabatic system adiabatic vaporization adiabatic wall temperature adiadochokinesis adiagnostic Adiaman adiathermanous adiathermic Adib Al- Shishakli Adib Nishaburi, Murza Abdul Jawad Ibn Mulla Abbas ADIC Adie's syndrome Adiel Adige Adige River Adigeni Adil Rza Ogly Iskenderov	Adiabatic compression Adiabatic compression adiabatic condensation pressure adiabatic condensation temperature Adiabatic Connection Formula Adiabatic cooling Adiabatic cooling adiabatic curing Adiabatic Curve Adiabatic decompression Adiabatic decompression Adiabatic demagnetization Adiabatic Demagnetization in the Rotating Frame Adiabatic Demagnetization Refrigerator Adiabatic Distorted Wave Infinite Order Sudden Adiabatic Electron Affinity adiabatic ellipse adiabatic engine adiabatic envelope adiabatic equilibrium adiabatic equivalent temperature Adiabatic expansion Adiabatic expansion adiabatic extrusion Adiabatic flame Adiabatic flame temperature Adiabatic flame temperature adiabatic flow Adiabatic Generator Coordinate Method Adiabatic heating Adiabatic Invariance Method Adiabatic invariant Adiabatic Isochoric Complete Combustion Adiabatic lapse Adiabatic lapse Adiabatic lapse rate Adiabatic lapse rate Adiabatic lapse rate adiabatic lapse rates adiabatic law Adiabatic line Adiabatic Low-Energy Injection and Confinement Experiment Adiabatic Nuclear Rotation Adiabatic Nuclei Approximation Adiabatic Oxygen Bomb Adiabatic Passage Hartmann-Hahn Adiabatic Passage Rotational-Resonance Adiabatic Perturbation Approximation Adiabatic Potential Energy Surface adiabatic process adiabatic process Adiabatic Quantum Algorithm Adiabatic Quantum Cellular Automata Adiabatic Quantum Computing adiabatic rate adiabatic recovery temperature adiabatic saturation pressure adiabatic saturation temperature

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Hillmansen (7) demonstrated, by increasing the crosshead speed in a series of dog-bone tensile tests, that adiabatic heating eventually destabilized drawing.

Uniaxial tensile properties underlying plane-stress rapid fracture ... by Ozbek, Pemra; Leevers, Patrick / Polymer Engineering and Science

Applying high hydrostatic pressure on a commercial basis to inactivate bacterial spores requires a knowledge of pressure-induced adiabatic heating and an understanding of the potential interactive synergistic effects on ionic and other equilibria in the end product and on the target organisms themselves.

High hydrostatic pressure by Microbial Update International

p] with further increases in test speed may have reflected a local increase in matrix mobility linked to adiabatic heating (24), a 50 K increase in temperature being observed ahead of the crack tip at speeds of 0.

Essential work of fracture of polypropylene and polypropylene blends ... by Grein, C.; Plummer, C.J.G.; Germain, Y.; Kausch, H.-H.; Beguelin, P. / Polymer Engineering and Science

adiabatic approximation

adiabatic atmosphere

adiabatic calorimeter

adiabatic chart

adiabatic compression

adiabatic condensation pressure