# OS-E: 0610 Manifold: Nonlinear Transient Heat Transfer

Nonlinear transient heat transfer analysis of a manifold is done using OptiStruct. The thermal conductivity of the material is a function of temperature.

## Model Files

Refer to Access the Model Files to download the required model file(s).

The model file used in this example includes:

new_manifold_only_NLTRANS_HT_curve2.fem

## Model Description

Consists of a manifold, on which the inlet is maintained at 355°C and the outlet at 122°C. The inside of the manifold is maintained at a temperature of 816°C. Temperature dependent material properties are defined using TABLEM1. Convective heat transfer occurs through the inside surface of the manifold. Here you run Nonlinear heat transfer analysis.

- Manifold
- First order Solid elements

**Property****Value**- Thermal Conductivity
- 0.045 W/mmK
- Poisson's Ratio
- 0.3
- Density
- 7.9 x 10
^{-9}ton/mm^{3}