With the increase in oil and gas pipe mileage, various corrosion defects inevitably occur, so mechanisms applicability of interaction are investigated. The ANSYS Workbench software is used to study three double defect models based on exterior wall, interior wall. First, distribution stress nephogram Second, failure pressure obtained through load step variety pressure. Finally, critical distance...

In this study, a verification experiment was carried out on survey method in which an infrared thermograph installed drone that has already been widely used for surveying the exterior wall, and accuracy of wall diagnosis examination procedure were examined. As result, it clarified points to be noted external by Infrared mounted drone, need improve drone.

We consider the problem of a body moving within an incompressible fluid at constant speed parallel to a wall, in an otherwise unbounded domain. This situation is modeled by the incompressible NavierStokes equations in an exterior domain in a half space, with appropriate boundary conditions on the wall, the body, and at infinity. We focus on the case where the size of the body is small. We prove...

We consider the problem of a body moving within an incompressible fluid at constant speed parallel to a wall in an otherwise unbounded domain. This situation is modeled by the incompressible Navier–Stokes equations in a planar exterior domain in a half space with appropriate boundary conditions on the wall, the body, and at infinity. We focus on the case where the size of the body is small. We ...

Three-dimensional printing, or additive manufacturing, is one of the modern techniques emerging in construction industry. Three-Dimensional Printed Concrete (3DPC) technology currently evolving with high demand amongst researchers, and integration modular building systems this would provide a sustainable solution to challenges. This work investigates develops energy-efficient 3D-printable walls...

Let EC denote the complexified adjoint Lie-algebra bundle associated to P . For the purposes of this summary, we will assume that E = EC; the more general case will be dealt with in section 7. Let dt : Ω (M ;EC)→Ω (M ;EC) denote the exterior derivative corresponding to At for each t. At t = 0, we wish to calculate the dimension of ker(D0), which gives the number of eigenvalues λα(t) of Dt passi...

Let M̃ be a (2m+ 1)-dimensional almost contact manifold with almost contact structure (φ,ξ,η), that is, a global vector field ξ, a (1,1) tensor field φ, and a 1-form η on M̃ such that φ2X =−X +η(X)ξ, η(ξ) = 1 for any vector field X on M̃. We consider a product manifold M̃×R, whereR denotes a real line. Then a vector field on M̃×R is given by (X , f (d/dt)), where X is a vector field tangent to M̃, t ...

We study the problem of a steady-state fluid-flexible structure interaction in 3D: a Stokes flow moving in an elastic tube. We consider periodic conditions (in the direction parallel to the tube’s axis) and assume the exterior lateral surface of the flexible wall clamped. We prove the existence of a solution of the coupled problem.