How do you calculate flux fluent heat?

When multiplying mass flow rate by weighted-average values of specific heat and temperature difference (the inlet or outlet avg. air temp. minus the reference temp.) I got around the same heat flux for the outlet as calculated by the Fluent, but 3 times higher for the inlet then the one given by the Fluent.

What is CFD solver?

What is CFD? Computational Fluid Dynamics (CFD) is the analysis of fluid flows using numerical solution methods. Sophisticated CFD solvers transform these laws into algebraical equations and are able to efficiently solve these equations numerically.

What are the discretization methods used in CFD?

Some of the discretization methods being used are:

• Finite volume method.
• Finite element method.
• Finite difference method.
• Spectral element method.
• Lattice Boltzmann method.
• Boundary element method.
• High-resolution discretization schemes.
• Reynolds-averaged Navier–Stokes.

What does discretization mean in CFD?

Discretization methods are used to chop a continuous function (i.e., the real solution to a system of differential equations in CFD) into a discrete function, where the solution values are defined at each point in space and time. Discretization simply refers to the spacing between each point in your solution space.

How to calculate wall heat flux in fluent?

In essence Fluent would calculate the fluid side heat flux as. Qf = h* (Tcell – Twall) = k_fluid*dT/dn at wall. where wall is the wall temp and cell is adjacent fluid cell. Now this calculation by Fluent assumes a simple wall – ie no mass flux from the wall to the cell.

Is the heat flux of a cell constant?

Temperature Just for clarification, the heat flux is not set to a constant value, but a value dependent upon the flow field temperature as well. where wall is the wall temp and cell is adjacent fluid cell. Now this calculation by Fluent assumes a simple wall – ie no mass flux from the wall to the cell.

How is heat flux related to temperature gradient?

Heat flux by the convection process is directly proportional to the temperature difference between solid, liquid, or gaseous media participating in heat transfer. Under the conduction process, the heat flux vector is directly proportional to and usually parallel to the temperature gradient vector.

How to do flow and heat transfer in fluent?

This tutorial demonstrates how to do the following: \Read an existing mesh \\fle in FLUENT. Check the grid for dimensions and quality. Study convective heat transfer. Specify solver settings and perform iterations. Create isosurfaces and points. Perform postprocessing. Compare the Nusselt number calculations with the literature. Prerequisites