What is the convection term in the momentum equation?
What is the convection term in the momentum equation?
“The terms on the left hand side of the momentum equations are called the convection terms of the equations. Convection is a physical process that occurs in a flow of gas in which some property is transported by the ordered motion of the flow.
What do the terms in the Navier Stokes equation mean?
where u is the fluid velocity, p is the fluid pressure, ρ is the fluid density, and μ is the fluid dynamic viscosity. The different terms correspond to the inertial forces (1), pressure forces (2), viscous forces (3), and the external forces applied to the fluid (4).
What is a source term in CFD?
A source term can be (e.g.) a energy source due to a chemical reaction, a mass source due to condensation. These sources are scalar functions and are added to the conservation laws. In the help files of the CFD program they will tell you how to use these sources.
What are four components of any flow model equations?
The four components are a long time average, a slow fluctuating component based on the difference between the long term average and the smoothed phase velocity developed by passing coherent structures, a fast fluctuating component which is periodic in nature and a streaming component created by the interaction between …
What is convective term?
Convection terms refer to the transport of quantities of interest (mass, momentum and energy) due to physical motion of a fluid at larger than molecular scales.
What is diffusive term?
Definition of diffusive : tending to diffuse : characterized by diffusion diffusive motion of atoms.
What are the non linear terms in the Navier-Stokes equation?
The nonlinear term in Navier–Stokes equations of Equation (1.17) is the convection term, and most of the numerical difficulties and stability issues for fluid flow are caused by this term.
What are the dependent variable in the Navier-Stokes equation?
Explanation: There are six dependent variables in the Navier-Stokes equations. They are pressure (p), temperature (T), density (ρ) and three components of the velocity vector (u,v,w).
What are source terms?
The release parameters (e.g. magnitude, rate, duration, orientation, temperature) that are the initial conditions for determining the consequences of the loss event for a hazardous material and/or energy release to the surroundings.
What is a source term in differential equation?
=f(t) for the variable u(t), the source term is the term on the right-hand-side of the equation, which depends only on the independent variable; in some cases it’s also referred to as the forcing.
How many components does the momentum equation have?
Momentum equation has 3 components. “All of these” equations can be expressed in terms of the substantial derivative? Streamlines: Curves that are drawn such that the tangents at every point along the curve are in the same direction as the velocity vectors at those points.
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