Exercise I. Optimization of a heater. We want to optimize the temperature T of a room Ω by the mean of a heater ω whose heat flux v ∈ L(ω) is controlled. An air stream of velocity u fills the room. We assume that the air is incompressible, that is u is assumed to be divergence free. Moreover, u is also assumed to be regular. The temperature on the boundary of the room is equal to the external t...

Using 1D and 2D cooling codes, we study thermal emission from neutron stars with steady state internal heaters of various intensities and geometries (blobs or spherical layers) located at different depths in the crust. The generated heat tends to propagate radially, from the heater down to the stellar core and up to the surface; it is also emitted by neutrinos. In local regions near the heater,...

Contact behavior of thermal flying height control sliders and interfacial temperature rise upon head disk contact is investigated utilizing the resistance change of the read and write element. To achieve contact, the heater element of a TFC slider is energized with constant and square wave input profiles. To estimate the temperature rise during head disk contact, the resistance change of the re...

WC introduce a new technique for rapidly heating (10’ “C/s) thin films using an electrical thermal annealing (ETA) pulse technique. By applying a high-current dc electrical pulse to a conductive substrate-heater material (Si), joule heating occurs thus heating the thin film. This method was demonstrated by heating thin films of aluminum at rates ranging from lo3 to lo6 “C/s. The temperature of ...

This article presents an optimization methodology for finding the heater settings that provide spatially uniform transient heating in manufacturing processes involving radiant heating. Equations governing the transient temperature and temperature sensitivity distributions over the product are first derived using an infinitesimal-area technique and then solved numerically to calculate the object...

Exercise I. Optimization of a heater. We want to optimize the temperature T of a room Ω by the mean of a heater ! whose heat flux v ∈ L(!) is controlled. An air stream of velocity u fills the room. We assume that the air is incompressible, that is u is assumed to be divergence free. Moreover, u is also assumed to be regular. The temperature on the boundary of the room is equal to the external t...

Carbon nanotube CNT heaters with sub-5 nm diameter induce highly localized phase change in Ge2Sb2Te5 GST chalcogenide. A significant reduction in resistance of test structures is measured as the GST near the CNT heater crystallizes. Effective GST heating occurs at currents as low as 25 A, significantly lower than in conventional phase change memory with metal electrodes 0.1– 0.5 mA . Atomic for...