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  2. Convection–diffusion equation - Wikipedia

    en.wikipedia.org/wiki/Convection–diffusion...

    The convection–diffusion equation can be derived in a straightforward way [4] from the continuity equation, which states that the rate of change for a scalar quantity in a differential control volume is given by flow and diffusion into and out of that part of the system along with any generation or consumption inside the control volume: + =, where j is the total flux and R is a net ...

  3. False diffusion - Wikipedia

    en.wikipedia.org/wiki/False_diffusion

    Fig 1:Flow domain illustrating false diffusion. In figure 1, u = 2 and v = 2 m/s everywhere so the velocity field is uniform and perpendicular to the diagonal (XX). The boundary conditions for temperature on north and west wall is 100 ̊C and for east and south wall is 0 ̊C.

  4. QUICK scheme - Wikipedia

    en.wikipedia.org/wiki/Quick_scheme

    In order to find the cell face value a quadratic function passing through two bracketing or surrounding nodes and one node on the upstream side must be used. In central differencing scheme and second order upwind scheme the first order derivative is included and the second order derivative is ignored.

  5. Subduction tectonics of the Philippines - Wikipedia

    en.wikipedia.org/wiki/Subduction_tectonics_of...

    The Philippine Trench results from the westward subduction of The Philippine Sea plate beneath the Philippine Mobile Belt. The north-trending trench extends from the southeastern Luzon (15˚30’N) to the northeast of Halmahera (2˚N), with a total length of 1,800 km (1,100 mi) [ 19 ] [ 16 ] and a maximum depth of 10,540 metres (6.55 miles). [ 27 ]

  6. Upwind differencing scheme for convection - Wikipedia

    en.wikipedia.org/wiki/Upwind_differencing_scheme...

    Lower case denotes the face and upper case denotes node; , , and refer to the "East," "West," and "Central" cell. (again, see Fig. 1 below). Defining variable F as convection mass flux and variable D as diffusion conductance = and =

  7. Upwind scheme - Wikipedia

    en.wikipedia.org/wiki/Upwind_scheme

    In computational physics, the term advection scheme refers to a class of numerical discretization methods for solving hyperbolic partial differential equations.In the so-called upwind schemes typically, the so-called upstream variables are used to calculate the derivatives in a flow field.

  8. Burgers' equation - Wikipedia

    en.wikipedia.org/wiki/Burgers'_equation

    Burgers' equation or Bateman–Burgers equation is a fundamental partial differential equation and convection–diffusion equation [1] occurring in various areas of applied mathematics, such as fluid mechanics, [2] nonlinear acoustics, [3] gas dynamics, and traffic flow. [4]

  9. Combined forced and natural convection - Wikipedia

    en.wikipedia.org/wiki/Combined_forced_and...

    The first case is when natural convection aids forced convection. This is seen when the buoyant motion is in the same direction as the forced motion, thus accelerating the boundary layer and enhancing the heat transfer. [5] Transition to turbulence, however, can be delayed. [6] An example of this would be a fan blowing upward on a hot plate.