On the reconstruction of dynamic permeability of cancellous bones
نویسندگان
چکیده
This article focuses on the mathematical problem of reconstructing dynamic permeability K(ω) of two-phase composites from data at different frequencies, utilizing the analytic structure of K(ω). To numerically simulate the data by solving the unsteady Stokes equations in the 3D domain reconstructed from μ-CT scans of the composites, the issue of segmentation is also addressed in this paper and an efficient segmentation scheme is suggested and implemented for cancellous bone.
منابع مشابه
Absolute Permeability Calculation by Direct Numerical Simulation in Porous Media
Simulating fluid flow at micro level is an ongoing problem. Simplified macroscopic flow models like Darcy’s law is unable to estimate fluid dynamic properties of porous media. The digital sample reconstruction by high resolution X-ray computed tomography scanning and fluid-dynamics simulation, together with the increasing power of super-computers, allow to carry out pore-scale simulations throu...
متن کاملThe Effect of Dynamic Permeability on Velocity and Intrinsic Attenuation of Compressional Waves in Sand
Stress waves contain useful information about the properties of porous materials; they can be recovered through different non-destructive testing methods such as crosswell, vertical seismic profile, borehole logging as well as sonic tests. In all these methods, it is crucial to assess the effects of frequency on wave attributes including velocity and intrinsic attenuation. The dependency of per...
متن کاملHeterogeneity of Necrotic Changes between Cortical and Cancellous Bone in Mandibular Osteoradionecrosis: A Histopathological Analysis of Resection Margin after Segmental Mandibulectomy
BACKGROUND This study aimed to analyze differences in necrotic changes between cortical and cancellous bone in resection margins after segmental mandibulectomy for advanced mandibular osteoradionecrosis. METHODS Anteroposterior bone specimens from eleven patients who underwent segmental mandibulectomy with simultaneous free fibula flap reconstruction for advanced osteoradionecrosis were analy...
متن کاملStochastic reconstruction of carbon fiber paper gas diffusion layers of PEFCs: A comparative study
A 3D microstructure of the non-woven gas diffusion layers (GDLs) of polymer electrolyte fuel cells (PEFCs) is reconstructed using a stochastic method. For a commercial GDL, due to the planar orientation of the fibers in the GDL, 2D SEM image of the GDL surface is used to estimate the orientation of the carbon fibers in the domain. Two more microstructures with different fiber orientations are g...
متن کاملThree-dimensional anatomy of the cancellous structures within the proximal femur from computed tomography data.
Quantitative computed tomography was used to investigate the three-dimensional architecture and the density distribution of the cancellous structures of the proximal femur. We examined 10 femora from the cadavera of 10 individuals, 47-83 years old at the time of death. Three anatomic elements could be distinguished: the epiphysis, the epiphyseal scar, and the metaphysis. Although these elements...
متن کامل