Simple Fluid-Thermal Analysis

Th features of simple fluid-thermal analysis (Pascal + Watt) are explained here with some examples.

The temperature distribution can be analyzed for the model with heat sources under the steady-state forced convection.

In Example 1 of Simple Fluid-Thermal Analysis, two heat sources are placed on a substrate, and there is a forced convection over the substrate.

The steady-state analysis is performed.

The distributions of flow velocity and temperature, and the heat flux are obtained.

Compared with the other fluid-thermal analysis software, Femtet performs the simplified analysis and the calculation is much faster.

Femtet can handle only the following.

Laminar flow (Turbulent flow cannot be analyzed)
Non-viscous fluid
Incompressible fluid
The heat transfer by fluid is considered as the thermal analysis with the heat transfer boundary condition set on the surface of the heat source
(The temperature distribution of the fluid cannot be observed.)
The fluid is the air only.
The openings (the entrance and the exit of the fluid) are required to be perpendicular to the flow vector.

The natural convection can be analyzed by selecting [Heat transfer: Convection] and [Natural convection (automatic calculation)] in the boundary condition dialog box of thermal analysis [Watt].

The functions of the simple fluid-thermal analysis are listed below. For more examples, see [Example List for Simple Fluid-Thermal Analysis].

Analysis types	Fluid: Steady-state analysis, Thermal: Steady-state and transient analyses
Materials	Isotropic/anisotropic, Linear/nonlinear solid or fluid (air, laminar, non-viscous, non-compressive)
Boundary conditions	Fluid: Flow velocity, Velocity potential / Thermal: Temperature, Heat transfer, Natural convection, Radiation, Heat flux
Obtained properties	Fluid: Flow velocity, Velocity potential / Thermal: Temperature, Heat flux
Miscellaneous	Heat source