A boundary discretization technique called the Unsteady Surface Element method (USEM) is applied to a model of a thermocouple wire attached to a thin disk. Green’s functions are then used to develop the integral equations for the wire and the disk. The model can be used to evaluate transient and steady state responses for many types of heat flux measurement devices, including thin skin calorimeters and circular foil heat flux gages. The utility of the error correction is demonstrated with the application of the inverse heat conduction problem (IHCP) to the determination of the unknown heat flux in a short-flash solar heating process. It is shown that errors in the temperature measurements can range from just a few degrees Celsius to about 100 °C.
Intrinsic Thermocouple Problem using Unsteady Surface Element Method
DE MONTE, FILIPPO;
2009-01-01
Abstract
A boundary discretization technique called the Unsteady Surface Element method (USEM) is applied to a model of a thermocouple wire attached to a thin disk. Green’s functions are then used to develop the integral equations for the wire and the disk. The model can be used to evaluate transient and steady state responses for many types of heat flux measurement devices, including thin skin calorimeters and circular foil heat flux gages. The utility of the error correction is demonstrated with the application of the inverse heat conduction problem (IHCP) to the determination of the unknown heat flux in a short-flash solar heating process. It is shown that errors in the temperature measurements can range from just a few degrees Celsius to about 100 °C.Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
