enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Darcy's law for multiphase flow - Wikipedia

    en.wikipedia.org/wiki/Darcy's_law_for_multiphase...

    The pressure gradient and the gravity term are identical for the flux and the rate equations, and will, therefore, be discussed only once. The task here is to have a gravity term that is consistent with the applied units ("H-units") for the pressure gradient. We must, therefore, place our conversion factor together with the gravity parameters.

  3. Pressure gradient - Wikipedia

    en.wikipedia.org/wiki/Pressure_gradient

    The horizontal pressure gradient is a two-dimensional vector resulting from the projection of the pressure gradient onto a local horizontal plane. Near the Earth's surface, this horizontal pressure gradient force is directed from higher toward lower pressure. Its particular orientation at any one time and place depends strongly on the weather ...

  4. Pressure-correction method - Wikipedia

    en.wikipedia.org/wiki/Pressure-correction_method

    The pressure value that is attempted to compute, is such that when plugged into momentum equations a divergence-free velocity field results. The mass imbalance is often also used for control of the outer loop. The name of this class of methods stems from the fact that the correction of the velocity field is computed through the pressure-field.

  5. Corrected d-exponent - Wikipedia

    en.wikipedia.org/wiki/Corrected_d-exponent

    The Corrected d-exponent, also known as dc-exponent or cd-exponent, is a parameter used in mud logging and formation pore pressure analysis in the petroleum industry. It is an extrapolation of certain drilling parameters to estimate a pressure gradient for pore pressure evaluation while drilling, particularly in over-pressured zones.

  6. Euler equations (fluid dynamics) - Wikipedia

    en.wikipedia.org/wiki/Euler_equations_(fluid...

    The second equation expresses that, in the case the streamline is curved, there should exist a pressure gradient normal to the streamline because the centripetal acceleration of the fluid parcel is only generated by the normal pressure gradient. The third equation expresses that pressure is constant along the binormal axis.

  7. Pressure-gradient force - Wikipedia

    en.wikipedia.org/wiki/Pressure-gradient_force

    In fluid mechanics, the pressure-gradient force is the force that results when there is a difference in pressure across a surface. In general, a pressure is a force per unit area across a surface. A difference in pressure across a surface then implies a difference in force, which can result in an acceleration according to Newton's second law of ...

  8. Balanced flow - Wikipedia

    en.wikipedia.org/wiki/Balanced_flow

    At all points, the pressure gradient points to the direction of maximum increase of p and is always normal to the isobar at that point. Since the flow packet feels a push from the higher to the lower pressures, the effective pressure vector force is contrary to the pressure gradient, whence the minus sign before the gradient vector. Friction.

  9. Projection method (fluid dynamics) - Wikipedia

    en.wikipedia.org/wiki/Projection_method_(fluid...

    It was originally introduced by Alexandre Chorin in 1967 [1] [2] as an efficient means of solving the incompressible Navier-Stokes equations. The key advantage of the projection method is that the computations of the velocity and the pressure fields are decoupled.