Using CFD, the paper deals with a simulation of all phenomena related to forced-air duct fitted fan, emphasis on unit aerodynamic resistance and untight air ducts. We created 3-dimentional model system including perforations simulating untightens in order make computation network. Boundary conditions were set calculations made ANSYS Fluent 19.1 programme. The computational results assessed usin...

In this paper, we study the solutions of the initial-value problem (IVP) for the quasi-geostrophic equations, namely ∂tθ + u.∇θ + κ (−∆) θ = 0, on R × ]0,+∞[ , θ (x, 0) = θ0(x), x ∈ R. Our goal is to establish the existence and uniqueness of regulars solutions for the two-dimentional dissipative quasi-geostrophic equation with initial data in a Sobolev space H satisfying suitable conditions wit...

By the simple finite element method, we study the symplectic, multisymplectic structures and relevant preserving properties in some semi-linear elliptic boundary value problem in one-dimensional and two-dimensional spaces respectively. We find that with uniform mesh, the numerical schemes derived from finite element method can keep a preserved symplectic structure in one-dimensional case and a ...