effect of two-dimensional topography on superficial thermal gradients

  • 86 Pages
  • 0.61 MB
  • English
U.S. Government Printing Office , Washington, DC
Earth temperature., Heat -- Transmis
Statementby Arthur H. Lachenbruch.
SeriesU.S. Geological Survey bulletin -- 1203-E
ContributionsGeological Survey (U.S.)
The Physical Object
Pagination86 p. :
ID Numbers
Open LibraryOL20562637M

THE EFFECT OF TWO-DIMENSIONAL TOPOGRAPHY ON SUPERFICIAL THERMAL GRADIENTS By AETHUE H. LACHENBRUCH ABSTRACT The Jeffreys-Bullard theory of the topographic disturbance to geothermal gradients is only approximate because it neglects the effects of lateral heat loss through sloping by: The Effect of Two-Dimensional Topography on Superficial Thermal Gradients (Geological Survey Bulletin E) Lachenbruch, Arthur H.

Price:US $ Quantity:1 Publisher: US Department of Interior Condition:Used: Acceptable Binding: Paperback Dust Jacket (if applicable). Date: ISBN: (if applicable): Unmarked Rating: % positive. Investigation of the effect of two-dimensional cavities on boundary layers in an adverse pressure gradient [Richard J Margason] on *FREE* shipping on qualifying : Richard J Margason.

The Jeffreys‐Bullard theory of the topographic correction to geothermal gradients cannot be applied with confidence if the height of the relief is large relative to the horizontal distance and depth of the measurement by: Two-Dimensional Thermal Conductivity Anomalies and Vertical Heat Flow Variations.

Authors; Authors and affiliations Rapid estimate of the topography disturbance to superficial thermal gradients.

Rev. Geophys. 6, Two-Dimensional Thermal Conductivity Anomalies and Vertical Heat Flow Variations. In: Čermák V., Rybach L.

Details effect of two-dimensional topography on superficial thermal gradients FB2

(eds Cited by: 9. Basing on three-dimensional numerical tank, effects of topography on the disffuse of thermal discharge in power plant is studied by selecting k-ɛ turbulence model in this paper.

The result shows that the larger the slope of the topography is, the bigger in the horizontal direction the diffusion of thermal discharge is; on the contrary, the thermal diacharge have more impact Cited by: 2. Changes in temperature are produced by bringing a heat source (soldering iron) close to a thin liquid film in a Petri dish, where the motions are easily observable owing to the rupture of the film.

The experiment is easy to perform, and the visualization of the effect can facilitate the introduction of surface tension gradients.

Description effect of two-dimensional topography on superficial thermal gradients EPUB

Thermal cycling of the cell, combined with slow rate cyclic voltammetry, allows to rapidly identify phase transitions in electrodes, due to the thermal effect of entropy changes. A cell with a temperature gradient maintained across is found to have a lower impedance than one held at the theoretical average by:   The paper deals with some problems connected with the evaluation of the temperature gradient topocorrections for the purposes of the Earth's heat flow measurements.

Some errors, occurring in the routine use of the method, suggested by Jeffreys and Bullard (JB method), are discussed. An example of simple topographic features is used to compare this Cited by: 5.

We discuss dynamic hydrophobicity from the perspective of the force required to move a water droplet on a surface and argue that the structure of the three-phase contact line is important. We studied the wettability of a series of silicon surfaces that were prepared by photolithography and hydrophobized using silanization reagents.

Hydrocarbon, siloxane, and fluorocarbon surfaces Cited by: It is readily demonstrated that uplift of the topographic surface has a negligible effect on the cooling history of an exhumed rock sample and cannot be quantified by current geochronologic methods.

The topography itself perturbs the isotherms to a depth that depends on both the vertical and horizontal scale of the surface by: The Earth's surface topography disturbs the thermal field making measured superficial thermal gradients (heat flow) higher or lower than the deep value.

Topographic disturbance can be removed from data by applying the respective by: 1. The effect of the melt thermal gradient on the size of the constitutionally supercooled This content has been downloaded from IOPscience. Please scroll down to see the full text.

In solid materials two effects in temperature gradients are observed. As material often p - and n-doped semiconductors are used. The pairs recombine and reject heat at the cold ends.

Thermal gradients F The first technical use of the thermodiffusion Author: Simone Wiegand. Both parts of the numerical programme are based on finite difference methods.

The first part can be used for one- and two-dimensional problems while the second part can be used for two- and three-dimensional problems. LONG-TERM PROCESSES Crustal temperatures in a young mountain range are affected by the regional uplift and erosion by: 5.

The Effect of a High Thermal Gradient on Sintering and Stiffening in the Top Coat of a Thermal Barrier Coating System Article (PDF Available) in Journal of Thermal Spray Technology 13(3) Variation of heat flux induced by a three-dimensional terrain is relatively large, as compared to two-dimensional features, but its areal extent is relatively limited.

The two-dimensional effects also extend relatively deeper. In applying two-dimensional algorithms to a three-dimensional terrain, the correction may be over- Cited by: 7.

21ème Congrès Français de Mécanique Bordeaux, 26 au 30 août 1 Thermal instability of two-dimensional stagnation point flow with opposing vertical thermal and solutal gradients F. MENDIL, F. NAIT BOUDA, D.

SADAOUI Laboratoire de Physique Théorique, Université de Béjaïa, Route de Targua Ouzemour Béjaïa, Algéria. Abstract. Although on the geological time and space scales the geothermal regime of the Earth is, strictly speaking, both a transient and three dimensional phenomenon, on the global scale by far the most important component of heat transfer is radial.

Furthermore, over times of the order of the thermal time constant for the crust, Cited by: Effects of topographic variability on the scaling of plant species richness in. gradient dominated landscapes. Gabriela Hofer. 1, Helene H Wagner. 2, Felix Herzog. Peter J Edwards.

5 1 FAL Agroscope Reckenholz, Swiss Federal Research Station for Agroecology and Agricul-6 ture, Zürich, Switzerland,Cited by: The effect of two-dimensional topography on superficial thermal gradients: steady heat flux through an inclined plane of arbitrary height and slope angle and.

Effect of thermal non-equilibrium, seafloor topography and fluid advection on BSR-derived geothermal gradient Article in Marine and Petroleum Geology 58 April with Reads.

Topography generally controls flow patterns at shallow levels (over thermal buoyancy), and for permeabilities less than about 1 mu D, metamorphic devolatilization controls flow patterns at depth.

As a result, fluids are driven during metamorphism from the hinterland to the foreland throughout the by:   The effect on ductility of strain rate and thermal gradients arising from deformation is examined in tensile specimens of AK steel.

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The total elongatione tot is taken as the measure of ductility, since it reflects changes in the strain hardeningn and strain-rate sensitivitym. Tensile specimens are pulled to failure in 23 °C air, at initial strain rates from Cited by: This site uses cookies.

By continuing to use this site you agree to our use of cookies. To find out more, see our Privacy and Cookies policy. In addition, thermal conductivity and temperature gradient negatively correlate, where an increase in thermal conductivity results in a reduction in temperature gradient, highlighting that heat flow is highly dependent on thermal conductivity (Sass et al.

The thermal conductivity of a specimen may be measured in situ or in the by: 4. Many monitoring processes have been proposed for the spot weld process, but most of these techniques involve the use of post weld verification methods.

An ultrasonic phased array has been shown to be a viable method for the monitoring the spot weld in 2D, however the presence of thermal gradients generated during the welding process can result in a loss of Author: Andrew Ouellette.

Indian Journal of Pure & Applied Physics Vol. 46, Julypp. Effect of horizontal thermal gradient on ferroconvection G Vaidyanathan a, R Sekar b & R Hemalatha c,* aDepartment of Physics, bDepartment of Mathematics, Pondicherry Engineering College, Puducherry cDepartment of Mathematics, Kanchi Mamunivar Centre for Post.

Experimental and theoretical geophysics. The effect of two-dimensional topography on superficial thermal gradients: steady heat flux through an inclined plane of arbitrary height and slope angle and its application to geothermal measurements.

The role of near topography and building effects in vertical gravity gradients approximation Pavol Zahorec1*, Juraj Papcˇo2, Michal Mikolaj2, Roman Pašteka3 and Viktória Szalaiová4 Introduction The requirement of precise determination of the vertical gradient of gravity (VGG) by means of relative grav.

Surface heat flow has been observed to be highly variable in the Nankai subduction margin. This study presents an investigation of local anomalies in surface heat flows on the undulating seafloor in the Nankai subduction margin. We estimate the heat flows from bottom-simulating reflectors (BSRs) marking the lower boundaries of the methane hydrate stability zone and evaluate topographic effects Cited by: 4.The aim of this paper is to examine in detail the effects of both Coriolis force and ice shelf basal topography on ISW plumes and their marine ice deposition.

This is accomplished by incorporating frazil ice dynamics and ocean–ice shelf interaction into an unsteady plume model that is two-dimensional in the horizontal by: Larval acute thermal preference ([]) (Reynolds & Casterlin ) and thermal influence on swimming speed (U) were measured in larvae from each of the three spawning events using a horizontal thermal enabled the larvae to choose a temperature while removing the influence of gravity and the tendency of abalone larvae to crowd at the tank surface (Prince et al.