3 edition of Periodic Heat Flow in A Stratified Medium with Application to Permafrost Problems found in the catalog.
Periodic Heat Flow in A Stratified Medium with Application to Permafrost Problems
United States Geological Survey
|Series||U.S. Geological Survey bulletin -- 1083A|
Periodic heat flow means that heat flow is a continu-ous function of time and repeats itself at regular inter vals. A semi-infinite solid has only one bounding plane and extends to infinity in all other directions. The problem of determining the temperature in a homo geneous semi-infinite solid undergoing periodic heat flow has been. PERIODIC HEAT FLOW IN A STRATIFIED MEDIUM WITH APPLICATION TO PERMAFROST PROBLEMS, Arthur H. Lachenbruch; Geological Survey Bulletin 10B3A () quantities of latent heat of fusion into the thermal by permafrost pose a wide range of problems. Engineers, designers, and construction and maintenance personnel.
this chapter: Special Heat Transfer Problems in Plastics Processing. HEAT TRANSFER MODES Temperature differences cause the flow of heat from a high temperature to a low temperature. There are three modes of heat transfer: conduction, convection, and radiation. The basic microscopic mechanism of conduction is the motion of molecules and electrons. () report enhancement of heat transfer from a heated wire by application of an acoustic field in the gas flow. Authors conclude that heat transfer coefficient increases with the strength of the sound waves, and the Nusselt number is proportional to the square root of the Reynolds number based on the amplitude of gas velocity in the sound wave.
The flow is subject to mixed convective heat transfer. The fluid is assumed to have a reasonably high magnetic Prandtl number which causes significant-induced magnetic field effects. Such fluid flows find application in many magnetohydrodynamic devices including MHD power-generation. Heat Transfer Correlations for Internal Flow Knowledge of heat transfer coefficient is needed for calculations shown in previous slides. Ø Correlations exist for various problems involving internal flow, including laminar and turbulent flow in circular and non-circular tubes and in annular flow. Ø For laminar flow we can derive h dependence.
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PERIODIC HEAT FLOW IN A STRATIFIED MEDIUM WITH APPLICATION TO PERMAFROST PROBLEMS By ARTHUR H. LACHENBRUCH ABSTRACT Solutions to the Fourier heat equation for quasi-steady periodic flow in a stratified semi-infinite medium can be Author: Arthur H.
Lachenbruch. Get this from a library. Periodic heat flow in a stratified medium, with application to permafrost problems. [Arthur H Lachenbruch; Geological Survey (U.S.)] -- A discussion of temperature fluctuiations in a stratified medium caused by a periodically varying surface temperature with special reference to the effects of seasonal temperature variation on gravel.
Periodic heat flow in a stratified medium with application to permafrost problems Bulletin A By: A.H. Lachenbruch. A.H. LachenbruchPeriodic heat flow in a stratified medium with application to permafrost problems. U.S. Geological Survey Bulletin, A () (United States Government Printing Office, Washington) Google Scholar.
Ogilvi, Cited by: 1. Periodic heat flow in a stratified medium with application to permafrost problems. Geol. Surv. Bull. A, 36 pp. Mundrv. Harmonic temperature waves in a horizontally layered medium. Geophys. Parasni.s. D.S. Effect of a uniform overburden on the passage of a thermal wave and the temperature in the underlying Cited by: Lachenbruch, A.H., Periodic heat flow in a stratified medium with application to permafrost problems.
U.S. Geological Survey Bulletin A (United States Government Printing Office. Periodic heat flow in a stratified medium with application to permafrost problems by A.H.
LachenbruchDirectional resistivity measurements in exploration for uranium deposits on the Colorado plateau, by G.V. KellerDissipation of the temperature effect of drilling a well in Arctic Alaska by A.H.
Lautenbruch and M.C. BrewerPulse-transient. Lachenbruch A H Periodic heat flow in a stratified medium, with application to permafrost problems Experimental and Theoretical Geophysics (Geological Survey Bulletin ) (Washington, DC: United States Government Printing Office) pp 1– Periodic Heat Flow.
In nature the variation of climatic conditions produces a non- steady state. Diurnal variations produce an approximately repetitive hour cycle of increasing and decreasing temperatures. The effect of this on a building is that in the hot period heat flows from the outdoors into the building, where some of it is stored.
This rough distinction serves as a precise definition of permafrost if “freezing” and “thawing” are considered to take place at 0°C. That is, permafrost is defined (Muller, ) as naturally occurring earth material whose temperature is below 0°C, winter and summer, irrespective of the state of any moisture that might be present.
The. LACHENBRUCH, A. Periodic heat flow in a stratified medium with application in permafrost problems. United States, Geological Survey, Bulletinp. MCDOUGALL, J. Periodic heat flow in a stratified medium with application to permafrost problems, ().
Permafrost temperature records: Indicators of climate change, Eos Trans. The permafrost base is defined as 0 °C isotherm, and thickness is defined as the depth from the surface to that isotherm. Permanent ice is found on or beneath approximately 20 % of dry land: 75 % of Alaska, 63 % of Canada, and 47 % of the Russian Federation are covered by permafrost.
PERIODIC HEAT FLOW TIME-LAG DECREMENT FACTOR periodic heat flow All the equations and calculation methods seen so far are valid if and only if, both out-door and indoor temperatures are constant.
As perfectly static conditions do not occur in nature, the basis of the above methods is the assumption of steady state conditions. Permafrost, heat flow, and the geothermal regime at Prudhoe Bay, Alaska.
Influence of Climate Variations on Rock Temperature and Heat Flow, Non-standard Problems in Basin Modelling, / Freezing of a porous medium in contact with a concentrated aqueous freezant: numerical modelling of coupled heat and mass transport.
conditioner, can be modeled as two-dimensional periodic heat flow. This tutorial illustrates how to set up and solve a periodic heat transfer problem, given a pre-generated mesh.
The system that is modeled is a bank of tubes containing a flowing fluid at one temperature that is immersed in a second fluid in cross flow at a different temperature.
Links. Chapters: Chapter A: Periodic heat flow in a stratified medium with application to permafrost problems Chapter B: Directional resistivity measurements in exploration for uranium deposits on the Colorado Plateau.
Animasaun, “Casson fluid flow with variable viscosity and thermal conductivity along exponentially stretching sheet embedded in a thermally stratified medium with exponentially heat generation,” Journal of Heat and Mass Transfer Research, vol. 2, no. 2, pp. 63–78, View at: Google Scholar. ANALYTICAL HEAT TRANSFER Mihir Sen Department of Aerospace and Mechanical Engineering University of Notre Dame Notre Dame, IN May 3, available to compute periodic heat flow into the building but for non-periodic transient heat flow computation technique is far lagging behind.
Time Domain Response Functions' is suitable method to solve linear problems involving transient and periodic heat flow. However, an attempt has been made to develop a correlation/ for computation of. ENVIROM,IENTAL GEOLOGY AND FOUNDATION PROBLEMS and extent of permafrost vary, and the consequences of building on ice-rich ground vary as well.
Lachenbruch, A. H.,Periodic heat flow in a stratified medium with application to permafrost problems: U.S. Geol Survey Bull.p.Pernnfrost, in Fairbridge, R. H., ed.Periodic Heat Flow in a Stratified Medium with Application to Permafrost Problems. U.S. Geological Survey. Bulletin A. 36 p.
_____. Three-dimensional heat conduction in permafrost beneath heated buildings. U.S. Geological Survey. Bulletin B. pp. BB _____. Thermal effects of the ocean on permafrost. Geological Society.The present study is concerned with periodic behavior of mixed-convective flow in an arc-shaped cavity with a vibrating lid.
Numerical predictions of the effects of frequency of the vibration of the lid on the cavity flow and heat transfer are presented. In this study, the dimensionless frequency of the lid velocity ranges between 0 and in order to investigate the lid vibration effects.