WebThe Biot number is defined as: where: h = film coefficient or heat transfer coefficient or convective heat transfer coefficient L C = characteristic length, which is commonly defined as the volume of the body divided by the surface area of the body, such that k b = Thermal conductivity of the body WebMar 1, 2015 · The mathematic expression of Biot’s effective stress is: \sigma_ {\text {eff}} = \sigma_ {\text {total}} - \alpha \cdot p , (1) where σ eff is the effective stress, MPa; σ total is the total stress, MPa; α is a fraction called Biot’s coefficient, and p is the pore pressure, MPa. The traditional method for measuring Biot’s coefficient ...

Physically measured anisotropic Biot coefficients for the four rock ...

WebThe Biot model of a fluid-filled porous material is constructed on the conceptual model of a coherent solid skeleton and a freely moving pore fluid (in other words both solid and fluid phases are fully connected). This conceptual picture dictates the choice of the kinematic quantities: a solid displacement vector u Webwhere α = K H α = K H is the Biot-Willis coefficient introduced above and 1 M = 1 R − K H2 1 M = 1 R − K H 2 is the constrained specific storage coefficient. It is seen that, in either form of the constitutive relationship, only three independent mechanical properties are … desolate era book 4 chapter 1

The influence of the pore shape on the bulk modulus and the Biot ...

WebJan 1, 2024 · The dynamic Biot's coefficient was calculated from shear wave velocity by Banthia et al. (1965), and Todd and Simmons (1972) showed the value of Biot's coefficient is less than 1. Moreover, having this coefficient and knowing the amount of bulk volume compressibility of rock sample, matrix compressibility could be calculated as well. WebJun 12, 2024 · Recently, we reviewed about 90 geomechanical lab reports (from different labs, different formations, different producing companies) containing extensive measurements of all different sorts of mechanical rock properties and we could not find even a trace of Biot’s coefficient measurement. WebA proper correlation of the Biot-Willis coefficient controlling the bulk volumetric strain is developed using the data available from various sources in a manner to meet the required endpoint ... chuck swindoll the grace to let others be