observational requirements, feasability, expectations
... Activity time scale with COROT (visible light) : spots lifetime combined with rotation period (solar case not so simple; instrumental low frequency noise) No real law, even empirical, to estimate the activity time scale exploratory approach based on many stars and comparison to their rotation peri ...
... Activity time scale with COROT (visible light) : spots lifetime combined with rotation period (solar case not so simple; instrumental low frequency noise) No real law, even empirical, to estimate the activity time scale exploratory approach based on many stars and comparison to their rotation peri ...
Weather Unit Test Study Guide
... Weather Instruments (thermometer, wind scale, anemometer, weather vane, psychrometer, barometer, rain gauge, etc) Weather vs climate 4 main cloud types and what they signal Explain harmful human actions (ex. Greenhouse effect, acid rain, deforestation, acid rain) (ie. What are they? How do they impa ...
... Weather Instruments (thermometer, wind scale, anemometer, weather vane, psychrometer, barometer, rain gauge, etc) Weather vs climate 4 main cloud types and what they signal Explain harmful human actions (ex. Greenhouse effect, acid rain, deforestation, acid rain) (ie. What are they? How do they impa ...
INTERCOMPANY MEMORANDUM CAL CHEM CORPORATION To
... surface at a fixed temperature Ts to the surrounding fluid at a temperature T with a heat transfer coefficient h. The heat transfer rate may be increased by increasing the convection coefficient h, reducing the fluid temperature T, or adding materials to the area A. ...
... surface at a fixed temperature Ts to the surrounding fluid at a temperature T with a heat transfer coefficient h. The heat transfer rate may be increased by increasing the convection coefficient h, reducing the fluid temperature T, or adding materials to the area A. ...
Temperature, Heat, and Expansion
... temperature. It is then dropped into a beaker containing 0.15 kg of water with an initial temperature of 21.0 oC. The bolt and the water then reach a final temperature of 25.0 oC. If the metal has a specific heat capacity of 889 J/kg x oC, find the initial temperature of the metal. ...
... temperature. It is then dropped into a beaker containing 0.15 kg of water with an initial temperature of 21.0 oC. The bolt and the water then reach a final temperature of 25.0 oC. If the metal has a specific heat capacity of 889 J/kg x oC, find the initial temperature of the metal. ...
Homework 6: Heat Transfer (Lowrie Chapter 4.2)
... (a) From what you have learned about time and length scales of thermal diffusion, roughly how thick is the crust after 1 day? How about 1 week and 1 month? (b) If the lava flow is 1 meter thick, how long should you wait before you can safely hike over the flow? (remember that it is cooling from both ...
... (a) From what you have learned about time and length scales of thermal diffusion, roughly how thick is the crust after 1 day? How about 1 week and 1 month? (b) If the lava flow is 1 meter thick, how long should you wait before you can safely hike over the flow? (remember that it is cooling from both ...
student powerpoint 3
... • During exercise- not much because source of heat exchange is little because the body surface area in contact with solid objects is small. ...
... • During exercise- not much because source of heat exchange is little because the body surface area in contact with solid objects is small. ...
Chapter 4.3
... When this air cools, it becomes more dense than the warmer air beneath it. The cooled air sinks and moves under the warmer air. Convection in liquids is similar. Warm water is less dense than cold water, so the warm water is pushed upward as cooler, denser water moves underneath. When the warm ...
... When this air cools, it becomes more dense than the warmer air beneath it. The cooled air sinks and moves under the warmer air. Convection in liquids is similar. Warm water is less dense than cold water, so the warm water is pushed upward as cooler, denser water moves underneath. When the warm ...
THE COMBINED HEAT TRANSFER OF RADIATION AND MIXED
... The mixed convection process inside a lid-driven cavity is found in many engineering applications such as solar collectors, cooling of electronic devices, heat exchangers (Cheng and Liu, 2010). Study of the literature shows that the problem is considered along two different parts, those are square o ...
... The mixed convection process inside a lid-driven cavity is found in many engineering applications such as solar collectors, cooling of electronic devices, heat exchangers (Cheng and Liu, 2010). Study of the literature shows that the problem is considered along two different parts, those are square o ...
Buffet_geoneutrino - University of Hawaii Physics and Astronomy
... heat conducted down adiabat Qa = 5 - 6 TW ...
... heat conducted down adiabat Qa = 5 - 6 TW ...
Document
... spectral line profiles & energy distribution, so we may still study convection observationally Simplest example of velocity field: stellar rotation Small for “cool” stars, large for “hot” stars ...
... spectral line profiles & energy distribution, so we may still study convection observationally Simplest example of velocity field: stellar rotation Small for “cool” stars, large for “hot” stars ...
Convection in stellar envelopes: a changing paradigm
... these threads. The fluid in between is passive, it has zero temperature fluctuation and is neutrally buoyant. It flows towards the boundaries to replace the mass flowing in the threads, rather than being driven there by convective buoyancy. Convection in a cell at high Ra is therefore as non-local a ...
... these threads. The fluid in between is passive, it has zero temperature fluctuation and is neutrally buoyant. It flows towards the boundaries to replace the mass flowing in the threads, rather than being driven there by convective buoyancy. Convection in a cell at high Ra is therefore as non-local a ...
lecture 3 `Rapidly rotating convection, dynamos, and scaling laws`
... The convection pattern at onset may be similar to that at higher Ra, so the dynamo properties of the flow are of interest. The effect of a magnetic field on the onset of convection is also important, as this gives a guide to the effects of Lorentz force. Magnetic field itself can also affect the dyn ...
... The convection pattern at onset may be similar to that at higher Ra, so the dynamo properties of the flow are of interest. The effect of a magnetic field on the onset of convection is also important, as this gives a guide to the effects of Lorentz force. Magnetic field itself can also affect the dyn ...
AA2 - U of L Class Index
... Can you think of conditions likely to support each of these three cases ? ...
... Can you think of conditions likely to support each of these three cases ? ...
Heat Transfer There are three mechanisms for the transfer of heat
... Heat Transfer There are three mechanisms for the transfer of heat: ◦ Conduction ◦ Convection ◦ Radiation CONDUCTION is a diffusive process wherein molecules transmit their kinetic energy to other molecules by colliding with them. CONVECTION is associated with the motion of the medium. When a hot mat ...
... Heat Transfer There are three mechanisms for the transfer of heat: ◦ Conduction ◦ Convection ◦ Radiation CONDUCTION is a diffusive process wherein molecules transmit their kinetic energy to other molecules by colliding with them. CONVECTION is associated with the motion of the medium. When a hot mat ...
Convection
Convection is the concerted, collective movement of groups or aggregates of molecules within fluids (e.g., liquids, gases) and rheids, through advection or through diffusion or as a combination of both of them. Convection of mass cannot take place in solids, since neither bulk current flows nor significant diffusion can take place in solids. Diffusion of heat can take place in solids, but that is called heat conduction. Convection cannot be demonstrated by placing a heat source (e.g. a Bunsen burner) at the side of a glass full of a liquid, and observing the changes in temperature in the glass caused by the warmer ghost fluid moving into cooler areas.Convective heat transfer is one of the major types of heat transfer, and convection is also a major mode of mass transfer in fluids. Convective heat and mass transfer take place both by diffusion – the random Brownian motion of individual particles in the fluid – and by advection, in which matter or heat is transported by the larger-scale motion of currents in the fluid. In the context of heat and mass transfer, the term ""convection"" is used to refer to the sum of advective and diffusive transfer. In common use the term ""convection"" may refer loosely to heat transfer by convection, as opposed to mass transfer by convection, or the convection process in general. Sometimes ""convection"" is even used to refer specifically to ""free heat convection"" (natural heat convection) as opposed to forced heat convection. However, in mechanics the correct use of the word is the general sense, and different types of convection should be qualified for clarity.Convection can be qualified in terms of being natural, forced, gravitational, granular, or thermomagnetic. It may also be said to be due to combustion, capillary action, or Marangoni and Weissenberg effects. Heat transfer by natural convection plays a role in the structure of Earth's atmosphere, its oceans, and its mantle. Discrete convective cells in the atmosphere can be seen as clouds, with stronger convection resulting in thunderstorms. Natural convection also plays a role in stellar physics.