The phenomenon of heat transfer in a liquid or gas as the hot and cold parts move together is called convection. Convection conditions can be entered in the desired part of the model (nodes, lines, faces). Convection generated by buoyancy due to density change caused by temperature difference in fluid is called free convection. Convection heat transfer rate is generally proportional to temperature difference. Enter the atmospheric temperature at which the structure is placed at ambient temperature, and the convection coefficient is the atmospheric convection coefficient. A time function can also be applied.

Name

Enter the name of  the convection condition.

Type

Select the type of target objects to which convective heat transfer conditions will be applied.  Face, 2D Element, 3D Element Face and 3D Element Free Face can be selected.

 Ambient Temperature

Enter the ambient temperature value for the selected target objects.

By Value

Enter the ambient temperature directly.

Ambient Temp. Function

In the ambient temperature function, you can define the outside temperature using Sine function, where

T: Maximum outside temperature,
to: Delay time, and
To: Minimum outside temperature.

Convection Coefficient

Enter the convection coefficient.

 Base Function

Set a spatial function or a non-spatial function as a base function to be applied to the magnitude of convection or temperature.

Time Function

Select the function to be applied to time.

 Global Time

The time applied to the time function is based on the total analysis time.

 Local Time

The time applied to the time function is based on the subcase time.

Thermal Load

Register the specified convection conditions to a desired thermal load set.  
The user may  assign any name to the load set.