The thermal diffusivity of eight well-characterized rocks for the temperature range 300–1000 K

Hanley, E.J.; DeWitt, D P.; Roy, Robert F.

doi:10.1016/0013-7952(78)90003-0

Cited by 70 publications

(36 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is in good agreement with the bulk temperature increase estimated along the slipping zone at the main frictional instability. If the heat production is (Beeler et al, 2008; Lachenbruch & Sass, 1980)

italicdQ = normalτ V italicdt

an estimate of the bulk temperature increase in the slipping zone during the experiments can be computed numerically using the approximation (Carslaw & Jaeger, 1959; Nielsen et al, 2008; Figure S6)

T ((), t) = \frac{1}{ρ \cdot C_{p} \cdot \sqrt{κπ}} \cdot \int_{0}^{t} \frac{1}{2} \cdot \frac{Q}{\sqrt{t - t^{'}}} italicdt

(with, for basalts, thermal diffusivity κ = 0.012 cm 2 /s; Hanley et al, 1978), specific heat capacity Cp = 898 J · kg −1 · K −1 (Waples & Waples, 2004), and density ρ = 2,960 kg/m 3 ). The numerical solution revealed indeed the achievement of bulk temperatures of several hundred degrees Celsius once the main instability was triggered, as shown in Figure S6.…”

Section: Discussionmentioning

confidence: 99%

Frictional Instabilities and Carbonation of Basalts Triggered by Injection of Pressurized H₂O‐ and CO₂‐ Rich Fluids

Giacomel

Spagnuolo

Nazzari

et al. 2018

Geophysical Research Letters

View full text Add to dashboard Cite

The safe application of geological carbon storage depends also on the seismic hazard associated with fluid injection. In this regard, we performed friction experiments using a rotary shear apparatus on precut basalts with variable degree of hydrothermal alteration by injecting distilled H2O, pure CO2, and H2O + CO2 fluid mixtures under temperature, fluid pressure, and stress conditions relevant for large‐scale subsurface CO2 storage reservoirs. In all experiments, seismic slip was preceded by short‐lived slip bursts. Seismic slip occurred at equivalent fluid pressures and normal stresses regardless of the fluid injected and degree of alteration of basalts. Injection of fluids caused also carbonation reactions and crystallization of new dolomite grains in the basalt‐hosted faults sheared in H2O + CO2 fluid mixtures. Fast mineral carbonation in the experiments might be explained by shear heating during seismic slip, evidencing the high chemical reactivity of basalts to H2O + CO2 mixtures.

show abstract

italicdQ = normalτ V italicdt

an estimate of the bulk temperature increase in the slipping zone during the experiments can be computed numerically using the approximation (Carslaw & Jaeger, 1959; Nielsen et al, 2008; Figure S6)

T ((), t) = \frac{1}{ρ \cdot C_{p} \cdot \sqrt{κπ}} \cdot \int_{0}^{t} \frac{1}{2} \cdot \frac{Q}{\sqrt{t - t^{'}}} italicdt

Section: Discussionmentioning

confidence: 99%

Frictional Instabilities and Carbonation of Basalts Triggered by Injection of Pressurized H₂O‐ and CO₂‐ Rich Fluids

Giacomel

Spagnuolo

Nazzari

et al. 2018

Geophysical Research Letters

View full text Add to dashboard Cite

show abstract

“…Thus in the 1950 's the appearance of much improved molecular correlations for certain fluid properties so satisfied the needs of the times that pressure for improvement abated (27). The time has again arrived where the ability to use accurate data has been developed far beyond the accuracy of the available data.…”

Section: The Session Papersmentioning

confidence: 99%

“…However, it is worthwhile to note that recent investigations are devoted to unraveling the complexities of the effects of rock composition and structural condition upon thermal conductivity. Among the characteristics and parameters studied are cracks and porosity (10)(11)(12)(13)(14) , chemical and mineral composition (15)(16)(17) , moisture and fluid content (18)(19)(20) , anisotropy (21)(22) , and temperature and pressure (9,(23)(24)(25)(26)(27) .…”

Section: Thermal Conductivity and Diffusivitymentioning

confidence: 99%

“…A careful inspection revealed that a thin layer of coke formed on the thruster side of the coolant passage which protected it against the extreme temperatures and thermal fluxes. Coking has been studied by petrol producers, (27,28,29) and was found to be quite sensitive to oxygen and sulfur compounds in the fuel.…”

Section: Some Developments Related To Rp1mentioning

confidence: 99%

“…Missenard (26) and the author ( 27 ) found that the thermal conductivities for chemically similar substances converged at one point, assuming a linear dependence on temperature. By careful analysis, values could be estimated to a moderately good degree of precision using this technique.…”

Section: General Approach To Property Tabulationmentioning

confidence: 99%

See 2 more Smart Citations

The technological importance of accurate thermophysical property information

Sengers¹,

Klein²

1980

View full text Add to dashboard Cite

6, 1979. The session was organized by the Committee on Thermophysical Properties (Committee K-7) of the Heat Transfer Division of the ASME. The mandate of this committee is to encourage scientific research in the field of thermophysical properties and to facilitate the flow of information from science to engineering so as to provide the engineering community with an adequate base for thermophysical property information.Of particular concern to the committee are the complications that arise from lack of communication between the users and generators of thermophysical property information. The user may have access to a computer program yielding thermophysical property values, but often does not know to what extent this information is reliable. As a consequence the technological decisions may unknowingly be affected by a lack of accuracy of the thermophysical property information used in the analysis.To call attention to these problems, the committee organized a session devoted to a discussion of the importance of accurate thermophysical property information for technology. The committee is convinced that this issue deserves wider recognition in the engineering community and expresses its appreciation to the National Bureau of Standards for its willingness to publish the proceedings of the meeting. Jan V. Sengers, Chairman Committee K-7 Heat Transfer Division, ASME iii ABSTRACT These papers were presented at a meeting of the American Society of Mechanical Engineers. The meeting session addressed the role of the accuracy of thermophysical properties data in a number of applications areas.The areas covered included aerospace sciences, where such data have played a central role for a number of years; and geosciences, where first steps are being taken toward using accuracy in describing systems in terms of thermophysical properties. Also included were a discussion of the economic value of accuracy in the chemical process industry, a description of the role of data centers, and a description of several high-»quallty data compilations. An example of a specific problem in the design of a heat exchanger for geothermal applications was also presented with the design uncertainties produced by data in accuracies illustrated.

show abstract

A Physics‐Based Rock Friction Constitutive Law: Steady State Friction

Aharonov

Scholz

2018

JGR Solid Earth

View full text Add to dashboard Cite

Experiments measuring friction over a wide range of sliding velocities find that the value of the friction coefficient varies widely: friction is high and behaves according to the rate and state constitutive law during slow sliding, yet markedly weakens as the sliding velocity approaches seismic slip speeds. We introduce a physics‐based theory to explain this behavior. Using conventional microphysics of creep, we calculate the velocity and temperature dependence of contact stresses during sliding, including the thermal effects of shear heating. Contacts are assumed to reach a coupled thermal and mechanical steady state, and friction is calculated for steady sliding. Results from theory provide good quantitative agreement with reported experimental results for quartz and granite friction over 11 orders of magnitude in velocity. The new model elucidates the physics of friction and predicts the connection between friction laws to independently determined material parameters. It predicts four frictional regimes as function of slip rate: at slow velocity friction is either velocity strengthening or weakening, depending on material parameters, and follows the rate and state friction law. Differences between surface and volume activation energies are the main control on velocity dependence. At intermediate velocity, for some material parameters, a distinct velocity strengthening regime emerges. At fast sliding, shear heating produces thermal softening of friction. At the fastest sliding, melting causes further weakening. This theory, with its four frictional regimes, fits well previously published experimental results under low temperature and normal stress.

show abstract

The thermal diffusivity of eight well-characterized rocks for the temperature range 300–1000 K

Cited by 70 publications

References 12 publications

Frictional Instabilities and Carbonation of Basalts Triggered by Injection of Pressurized H₂O‐ and CO₂‐ Rich Fluids

Frictional Instabilities and Carbonation of Basalts Triggered by Injection of Pressurized H₂O‐ and CO₂‐ Rich Fluids

The technological importance of accurate thermophysical property information

A Physics‐Based Rock Friction Constitutive Law: Steady State Friction

Contact Info

Product

Resources

About

The thermal diffusivity of eight well-characterized rocks for the temperature range 300–1000 K

Cited by 70 publications

References 12 publications

Frictional Instabilities and Carbonation of Basalts Triggered by Injection of Pressurized H2O‐ and CO2‐ Rich Fluids

Frictional Instabilities and Carbonation of Basalts Triggered by Injection of Pressurized H2O‐ and CO2‐ Rich Fluids

The technological importance of accurate thermophysical property information

A Physics‐Based Rock Friction Constitutive Law: Steady State Friction

Contact Info

Product

Resources

About

Frictional Instabilities and Carbonation of Basalts Triggered by Injection of Pressurized H₂O‐ and CO₂‐ Rich Fluids

Frictional Instabilities and Carbonation of Basalts Triggered by Injection of Pressurized H₂O‐ and CO₂‐ Rich Fluids