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  2. Celebrate grandparenthood – clarify boundaries for healthy ...

    www.aol.com/celebrate-grandparenthood-clarify...

    According to Holeman, boundaries come in three forms: rigid, porous and healthy. “Rigid boundaries usually include words like always or never,” she said. “Porous boundaries often look like ...

  3. Void ratio - Wikipedia

    en.wikipedia.org/wiki/Void_ratio

    in which, for idealized porous media with a rigid and undeformable skeleton structure (i.e., without variation of total volume when the water content of the sample changes (no expansion or swelling with the wetting of the sample); nor contraction or shrinking effect after drying of the sample), the total (or bulk) volume of an ideal porous ...

  4. Porous medium - Wikipedia

    en.wikipedia.org/wiki/Porous_medium

    Fluid flow through porous media is a subject of common interest and has emerged a separate field of study. The study of more general behaviour of porous media involving deformation of the solid frame is called poromechanics. The theory of porous flows has applications in inkjet printing [7] and nuclear waste disposal [8] technologies, among others.

  5. Immersed boundary method - Wikipedia

    en.wikipedia.org/wiki/Immersed_Boundary_Method

    Immersed Boundary Method for Uniform Meshes in 2D, A. Fogelson, Utah; IBAMR : Immersed Boundary Method for Adaptive Meshes in 3D, B. Griffith, NYU. IB2d: Immersed Boundary Method for MATLAB and Python in 2D with 60+ examples, N.A. Battista, TCNJ; ESPResSo: Immersed Boundary Method for soft elastic objects; CFD IBM code based on OpenFoam

  6. Pore structure - Wikipedia

    en.wikipedia.org/wiki/Pore_structure

    Micro CT of porous medium: Pores of the porous medium shown as purple color and impermeable porous matrix shown as green-yellow color. Pore structure is a common term employed to characterize the porosity, pore size, pore size distribution, and pore morphology (such as pore shape, surface roughness, and tortuosity of pore channels) of a porous medium.

  7. Thermodynamic system - Wikipedia

    en.wikipedia.org/wiki/Thermodynamic_system

    Rigid boundary – not allowing exchange of work: A mechanically isolated system One example is fluid being compressed by a piston in a cylinder. Another example of a closed system is a bomb calorimeter , a type of constant-volume calorimeter used in measuring the heat of combustion of a particular reaction.

  8. Boundary conditions in fluid dynamics - Wikipedia

    en.wikipedia.org/wiki/Boundary_conditions_in...

    Showing wall boundary condition. The most common boundary that comes upon in confined fluid flow problems is the wall of the conduit. The appropriate requirement is called the no-slip boundary condition, wherein the normal component of velocity is fixed at zero, and the tangential component is set equal to the velocity of the wall. [1]

  9. Falkner–Skan boundary layer - Wikipedia

    en.wikipedia.org/wiki/Falkner–Skan_boundary_layer

    The basis of the Falkner-Skan approach are the Prandtl boundary layer equations. Ludwig Prandtl [2] simplified the equations for fluid flowing along a wall (wedge) by dividing the flow into two areas: one close to the wall dominated by viscosity, and one outside this near-wall boundary layer region where viscosity can be neglected without significant effects on the solution.