Introduction to Modern Physics PHYX 2710
... Carnot Engine and Carnot Cycle • Carnot considered the ideal (most efficient possible) engine for a give TH and TC. • Carnot engine has negligible work lost to friction, turbulence, heat loss, etc. • Carnot also reasoned that the processes should occur without undue turbulence. – The engine is comp ...
... Carnot Engine and Carnot Cycle • Carnot considered the ideal (most efficient possible) engine for a give TH and TC. • Carnot engine has negligible work lost to friction, turbulence, heat loss, etc. • Carnot also reasoned that the processes should occur without undue turbulence. – The engine is comp ...
EssentialHeatTransfer - University Courses in Electronic Materials
... Consider a coaxial cable that has an aluminum core conductor and polyethylene (PE) as the dielectric insulation with the following properties: Core conductor resistivity ρ = 27 nΩ m, core radius, a = 5 mm, dielectric thickness, b − a = 3 mm, thermal conductivity of PE κ = 0.3 W m-1 K-1. The outside ...
... Consider a coaxial cable that has an aluminum core conductor and polyethylene (PE) as the dielectric insulation with the following properties: Core conductor resistivity ρ = 27 nΩ m, core radius, a = 5 mm, dielectric thickness, b − a = 3 mm, thermal conductivity of PE κ = 0.3 W m-1 K-1. The outside ...
Multi-scale anisotropic heat diffusion based on normal
... field is strongly desirable. Second, all the previous heat diffusions are isotropic in nature, which are based on isotropic heat kernels on manifolds. Yet, anisotropic diffusion is much more desirable in many cases, such as ...
... field is strongly desirable. Second, all the previous heat diffusions are isotropic in nature, which are based on isotropic heat kernels on manifolds. Yet, anisotropic diffusion is much more desirable in many cases, such as ...
Global distribution of the lithosphere-asthenosphere
... V. M. Hamza and F. P. Vieira: Global distribution of the lithosphere-asthenosphere boundary Hamza et al. (2010) presented a model that takes into consideration the thermal consequences of variable rates of magma accretion at the lower boundary of the lithosphere. According to this model (designated ...
... V. M. Hamza and F. P. Vieira: Global distribution of the lithosphere-asthenosphere boundary Hamza et al. (2010) presented a model that takes into consideration the thermal consequences of variable rates of magma accretion at the lower boundary of the lithosphere. According to this model (designated ...
Full Text
... bound by infinite vertical plates. They considered the temperature of the plate is oscillating with time about a nonzero constant. However, Pop9 solved the problem of transient free convection in porous medium adjacent to a vertical semi-infinite flat plate with a steep increase in wall temperature ...
... bound by infinite vertical plates. They considered the temperature of the plate is oscillating with time about a nonzero constant. However, Pop9 solved the problem of transient free convection in porous medium adjacent to a vertical semi-infinite flat plate with a steep increase in wall temperature ...
Effect of ancient Inuit fur parka ruffs on facial heat transfer
... ABSTRACT: The traditional clothing system developed and used by the Inuit is the most effective cold weather clothing developed to date. One of the key elements used by the Inuit is a fur ruff attached to the hood, hem, and cuffs of their parkas. This paper determines why the fur ruff is so critical ...
... ABSTRACT: The traditional clothing system developed and used by the Inuit is the most effective cold weather clothing developed to date. One of the key elements used by the Inuit is a fur ruff attached to the hood, hem, and cuffs of their parkas. This paper determines why the fur ruff is so critical ...
Chapter 18
... heat his house, how many barrels of oil go up the chimney as waste heat? a. 20 b. 60 c. 40 d. 80 e. 10 ANS: c 35. A lawnmower has a 6 horsepower engine (1 HP = 750 watts). If the engine has an efficiency of 20%, and the throttle is such that the engine cycles 10 times a second, the heat in J that is ...
... heat his house, how many barrels of oil go up the chimney as waste heat? a. 20 b. 60 c. 40 d. 80 e. 10 ANS: c 35. A lawnmower has a 6 horsepower engine (1 HP = 750 watts). If the engine has an efficiency of 20%, and the throttle is such that the engine cycles 10 times a second, the heat in J that is ...
Air Mass Modification over the Eastem Gulf of Mexico as a Function
... of the fluxes, the trade-wind distributions (Figs. 4 and 5) rather than the north-wind distributions, although the fluxes during the northerlies are significantly larger. However, days with trade-wind conditions are more prevalent than those with north-wind conditions (three times more days with tra ...
... of the fluxes, the trade-wind distributions (Figs. 4 and 5) rather than the north-wind distributions, although the fluxes during the northerlies are significantly larger. However, days with trade-wind conditions are more prevalent than those with north-wind conditions (three times more days with tra ...
Heat sink
A heat sink is a passive heat exchanger that transfers the heat generated by an electronic or a mechanical device into a coolant fluid in motion. Then-transferred heat leaves the device with the fluid in motion, therefore allowing the regulation of the device temperature at physically feasible levels. In computers, heat sinks are used to cool central processing units or graphics processors. Heat sinks are used with high-power semiconductor devices such as power transistors and optoelectronics such as lasers and light emitting diodes (LEDs), where the heat dissipation ability of the basic device is insufficient to moderate its temperature.A heat sink is designed to maximize its surface area in contact with the cooling medium surrounding it, such as the air. Air velocity, choice of material, protrusion design and surface treatment are factors that affect the performance of a heat sink. Heat sink attachment methods and thermal interface materials also affect the die temperature of the integrated circuit. Thermal adhesive or thermal grease improve the heat sink's performance by filling air gaps between the heat sink and the heat spreader on the device.