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If the temperature of the environment is known beforehand, then a thermistor may be used to measure the value of the dissipation constant. For example, the thermistor may be used as a flow-rate sensor, since the dissipation constant increases with the rate of flow of a fluid past the thermistor.
In physics, the dissipation factor (DF) is a measure of loss-rate of energy of a mode of oscillation (mechanical, electrical, or electromechanical) in a dissipative system. It is the reciprocal of quality factor , which represents the "quality" or durability of oscillation.
Quantity (common name/s) (Common) symbol/s Defining equation SI unit Dimension Temperature gradient: No standard symbol K⋅m −1: ΘL −1: Thermal conduction rate, thermal current, thermal/heat flux, thermal power transfer
Absolute thermal resistance is the temperature difference across a structure when a unit of heat energy flows through it in unit time.It is the reciprocal of thermal conductance.
In thermodynamics, dissipation is the result of an irreversible process that affects a thermodynamic system. In a dissipative process, energy ( internal , bulk flow kinetic , or system potential ) transforms from an initial form to a final form, where the capacity of the final form to do thermodynamic work is less than that of the initial form.
The microcanonical partition sum of a heat bath of temperature T has the property (+) = /, where is the Boltzmann constant. It thus changes by the same factor when a given amount of energy is added. It thus changes by the same factor when a given amount of energy is added.
the total electric current density J multiplied by the voltage drop across the circuit, , and the system volume V, divided by the absolute temperature T, of the heat reservoir times the Boltzmann constant. Thus the dissipation function is easily recognised as the Ohmic work done on the system divided by the temperature of the reservoir.
When stated in terms of temperature differences, Newton's law (with several further simplifying assumptions, such as a low Biot number and a temperature-independent heat capacity) results in a simple differential equation expressing temperature-difference as a function of time. The solution to that equation describes an exponential decrease of ...