2024 Biot coefficient

Biot coefficient

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August undefined, 2024

WebMay 28, 2024 · For the investigated samples, measured liquid permeabilities were in the range of 7–10 mD and Biot’s coefficients were 0.84–0.91. This is consistent with similar investigations by other researchers in which measured Biot’s coefficients were in … Web2 days ago · These findings suggest that the anisotropy of the Biot coefficient has a significant impact on deformation caused by frost action, and therefore numerical simulations should adequately consider this factor. The second paper is from Dolaana Khovalyg, Alexandre Mudry, and Thomas Keller from Ecole Polytechnique Fédérale de …

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WebMar 25, 2024 · Biot coefficient (Fig.1). The amplitude difference between the absolute value of the H and the initial stress increases in the horizontal direction of model with the … WebMay 19, 2024 · However, the area-averaged overall cooling effectiveness uniformity coefficient depends on the Biot number. Film cooling is widely applied as an effective way to maintain the turbine blade temperature at an acceptable level. The present paper investigates the overall cooling effectiveness and flow structure by performing conjugate … larissa rolim

Estimation of Biot’s effective stress coefficient from well logs

Web^ Green DH, Wang HF (1990) Specific storage as a poroelastic coefficient. Water Resour Res 26(7):1631–1637 ^ Biot MA (1956) General solutions of the equations of elasticity and consolidation for a porous material. J Appl Mech ASME 78:91–96 ^ Biot MA, Willis DG (1957) The elastic coefficients of the theory of consolidation. J Appl Mech ASME ... WebBiot Number. Bi is the Biot number, which is a dimensionless number that represents the ratio of the resistance to heat transfer from the inside of the body to the surface of the body (52). ... where k f is the film mass transfer coefficient, d p is the particle diameter, and D eff is the effective diffusion coefficient. The k f value of bovine ... WebIn 2008 he was awarded the M. A. Biot medal of Poromechanics from the American Society of Civil Engineers (ASCE) for his outstanding research contributions in extending Biot theory to the acoustics of air filled sound absorbing porous materials by providing models and measuring techniques for the industry. ... 3.5 Reflection coefficient and ... larissa rosa da silva

Subsurface stress and pore pressure - PetroWiki

The Elastic Coefficients of the Theory of Consolidation

WebFeb 1, 2010 · Biot's coefficient is a measure of sediment stiffness. In the present paper we addressed how this is related to the stress of pore collapse and creep for the calcareous … WebJul 10, 2024 · Biot coefficient and elastic moduli are typically assumed to have a constant value for analyzing poroelastic effects of fluid injection. To investigate the stress–pore … larissa rootWebJun 10, 2024 · Abstract. The theory of the deformation of a porous elastic solid containing a compressible fluid has been established by Biot. In this paper, methods of measurement are described for the determination of the elastic coefficients of the theory. The physical interpretation of the coefficients in various alternate forms is also discussed. Any … larissa roose nrj

"WebJun 29, 2024 · It can be observed from Fig. 6 that, on average, for sandstones and limestones the Biot coefficient is equal to 0.75 and for the marbles-granite group the Biot coefficient can be lower and in the ... " - Biot coefficient

Biot coefficient

Estimation of Biot’s effective stress coefficient from well logs

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 … WebJan 1, 2024 · The Biot's coefficient values the effect of the pore pressure on the total stress that is measured statically and dynamically. This static and dynamic Biot's coefficient was measured simultaneously on porous dolomite samples. Also, experiments have been carried out in two conditions of ambient and reservoir (90 °C) conditions. The …

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WebAug 1, 2024 · The knowledge of Biot’s effective stress coefficient is of particular importance to simulate the effects of pore pressure variations during reservoir depletion and injection operations. Direct ... WebJun 11, 2024 · The objective of this paper is to develop an easy‐to‐use correlation for estimating the Biot coefficient. This is important because the Biot coefficient plays an …

WebApr 10, 2024 · The Biot coefficient is an important aspect of the theory of classical poroelasticity since it accounts for the rational estimation of effective stresses in a fluid-saturated porous media. The effective stresses ultimately control the deformations and failure of the skeletal fabric. In principle, the Biot coefficient can be estimated if the ... WebJun 12, 2024 · Recently, we reviewed about 90 geomechanical lab reports (from different labs, different formations, different producing companies) containing extensive …

WebThe Biot coefficient is the fluid volume change induced by bulk volume changes in the drained condition. However, there is experimental evidence showing a difference … WebJan 4, 2024 · Poroelasticity Material Properties. The constitutive law for an isotropic, poroelastic material is. σ = C ε − α d p. where C is the compliance tensor, α is the poroelasticity Biot coefficient (dimensionless from 0 to 1) and d p = p − p 0 is difference in pore pressure relative to the reference pore pressure.

WebUsing Biot's poroelasticity theory, we derive expressions for the reflection and transmission coefficients for a plane shear wave incident on an interface sepa 掌桥科研一站式科研服务平台

WebMay 19, 2024 · However, the area-averaged overall cooling effectiveness uniformity coefficient depends on the Biot number. Film cooling is widely applied as an effective … larissa rosensteinWebAug 1, 2024 · A more practical and affordable method uses sonic log data to calculate dynamic Biot’s coefficient through the equation α= 1-K dry /K 0 (1) where K dry and K 0 are dry rock and effective mineral modulus, … larissa rossnerWebRefresher of Biot’s static poroelasticity model Biot’s dynamic poroelastic model from the non-equilibrium ﬁltration theory Low frequency reﬂections from a plane interface … larissa rostam-khaniWebBiot theory is the basis to describe wave propagation in porous media, starting with Terzaghi law, Gassmann equation, and the static approach leading to the concept of … larissa rudolphWebThe Biot coefficient can be defined in three ways: Default (Constant value of 1.0) User defined constant for all element. One value for each element based on imported values … larissa rotterWebThe obtained results ( Table 3) show that the Biot coefficient is stress dependent. The Biot coeftlcient go from 0.84 for a vertical stress of 8.75 MPa to 0.42 for a vertical stress equal to 35 ... larissa rutterWebJul 1, 2024 · Blöcher et al. 23 states that, the non-linear section of the Biot coefficient curve falls between about 0 and 20 MPa effective pressure; however, the present study performed no unload–reload loops at these low pressures because this test series was designed to explore the Biot coefficient at high mean effective stress. Therefore, it is ... larissa ruf