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  • 1
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    Component parts of the World Heat Flow Data Collection
    PANGAEA
    Details
    Publication Date: 2023-05-12
    Keywords: Conductivity, average; Heat flow; Heat production, average; LATITUDE; LONGITUDE; Method comment; Temperature gradient
    Type: Dataset
    Format: text/tab-separated-values, 104 data points
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  • 2
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    Component parts of the World Heat Flow Data Collection
    PANGAEA
    Details
    Publication Date: 2023-05-12
    Keywords: Area/locality; Conductivity, average; Depth, bottom/max; Heat flow; LATITUDE; LONGITUDE; Method comment; Number; Sample, optional label/labor no; Temperature gradient
    Type: Dataset
    Format: text/tab-separated-values, 246 data points
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    DATA PANGAEA
  • 3
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    Component parts of the World Heat Flow Data Collection
    PANGAEA
    Details
    Publication Date: 2023-05-12
    Keywords: Area/locality; Conductivity, average; Depth, bottom/max; Depth, top/min; Heat flow; LATITUDE; LONGITUDE; Method comment; Sample, optional label/labor no; Temperature gradient
    Type: Dataset
    Format: text/tab-separated-values, 79 data points
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  • 4
    Electronic Resource
    Electronic Resource
    Numerical calculations of the thermal conductivities of composites: a 2-D model (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical journal international 118 (1994), S. 0 
    Details
    ISSN: 1365-246X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: A 2-D numerical finite-difference model has been developed to calculate the thermal conductivity of a composite material. The method is general in that the distribution of components within the material can be ordered or random. Results from the calculations are compared with those based on a geometric model in which the conductivity of the composite depends on the volume fractions of the different components and with conductivities calculated using real-space renormalization group theory (RSRG) and the effective medium approximation (EMA). The results from the present work compare well with the geometric model and the EMA, whereas the RSRG results generally indicate lower conductivities. Possible reasons for the differences between the RSRG theory and the other methods are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-246X.1994.tb03989.x
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    A THREE-DIMENSIONAL NUMERICAL BOTTOM-HOLE TEMPERATURE STABILIZATION MODEL (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 32 (1984), S. 0 
    Details
    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: The heat flow equation in cylindrical coordinates is solved numerically for any general distribution of thermal diffusivity. The temperature stabilization of a borehole is considered, and solutions for the case where thermal diffusivity is a function of radial distance from the borehole are obtained and compared to solutions for uniform diffusivity. The results are discussed in terms of thermal diffusivities that are different for the well contents and for the surrounding material. It is found that the approach to formation temperature is affected by differences between well contents and the surrounding region.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1984.tb00714.x
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  • 6
    Electronic Resource
    Electronic Resource
    A COMPARISON OF TWO METHODS OF ESTIMATING STATIC FORMATION TEMPERATURE FROM WELL LOGS (1982)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 30 (1982), S. 0 
    Details
    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: Two methods for estimating the true formation temperature from well logs are compared. One method requires knowledge of the circulation time, whereas the other requires an estimate of the thermal diffusivity of the contents of the well. Both methods require three or more successive bottom-hole temperature measurements. Data from 157 wells have been analyzed, and the calculated formation temperatures from the two methods agree well. By an analysis of best matching of the two methods, it is found that 0.35 × 10-6 m2 s-1 is a good estimate for the thermal diffusivity of the well contents.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1982.tb01311.x
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  • 7
    Electronic Resource
    Electronic Resource
    Pre-Precipitation Phenomena Age-Hardening Alloys (1941)
    [s.l.] : Nature Publishing Group
    Nature 147 (1941), S. 327-328 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] USING an improved X-ray technique, Preston1 and Guinier2 have shown that when aluminium-copper single crystals containing 4 per cent copper are aged at low temperatures, thin plates of copper-rich atoms are formed on (100) planes of the crystal. Swindells and ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/147327b0
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  • 8
    Electronic Resource
    Electronic Resource
    Molecular Structure of Organised Bodies (1900)
    [s.l.] : Nature Publishing Group
    Nature 61 (1900), S. 273-274 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] PROF. VINES, in his “Physiology of Plants,” says that the molecular structure of cells can only be inferred from their properties, and that a correct conception of this structure is essential for a proper comprehension of cell growth. In the same work the author also states that Naegeli argues: ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/061273b0
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  • 9
    Electronic Resource
    Electronic Resource
    Geothermal gradients and heat flow in the Beaufort-Mackenzie Basin, Arctic Canada (1990)
    Springer
    Pure and applied geophysics 134 (1990), S. 473-483 
    Details
    ISSN: 1420-9136
    Keywords: Geothermal gradients ; heat flow ; Arctic Canada
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Thermal gradients have been calculated and heat flow estimates made for 34 petroleum exploration wells along four regional profiles crossing the Mesozoic-Cenozoic Beaufort-Mackenzie Basin of northern Canada. The geothermal gradients vary from 22 mKm−1 to 44 mKm−1. Four sets of possible thermal conductivity values were used to calculate a range of heat flow values for each well. Generally low heat flow is observed in wells within the deeper portions of the basin and higher heat flow values occur in wells along the Aklavik Arch Complex which forms the southeastern margin of the basin. The contribution to heat flow by heat generation below the Mesozoic-Cenozoic basin fill sediments has been considered. The heat flow contribution from sub-Mesozoic sedimentary strata and underlying basement is highest along the basin-bounding Aklavik Arch Complex. The decrease in heat flow from below the basin fill sediments toward the basin depocenter may be related to basinward crustal thinning and corresponding reductions in intra-crustal radiogenic heat production.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00878743
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  • 10
    Electronic Resource
    Electronic Resource
    In situ thermal conductivity and equilibrium formation temperature from circulation flow rate variations (1989)
    Springer
    Pure and applied geophysics 130 (1989), S. 687-697 
    Details
    ISSN: 1420-9136
    Keywords: Thermal conductivity ; transient heat transfer ; borehole temperature logging
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract A temperature-transient method to estimatein situ formation thermal conductivity and equilibrium formation temperature using circulation fluid flow-rate pulses is described. Flow-rate changes induce temperature variations in the well and the time from when the flow alters to the subsequent maximum or minimum temperature of the drilling fluid can be used to determine these two formation parameters. Some examples are presented to illustrate the method.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00881604
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