Temperature residual, exterior shell result

The Temperature residual, exterior shell result shows the absolute error for the temperature solution, in relation to the mold temperature convergence tolerance value.

This value is set on the Advanced Options page of the Process Settings Wizard-Cool Settings page.

Note: This result is only created if the convergence tolerance was not reached for at least one of the elements in the model.

Using this result

This result allows you to see which elements converged well and which elements had difficulty converging in the Cool analysis. The lower the temperature value (displayed in blue), the better the convergence for those elements. The higher the temperature value (displayed in red), the worse the convergence in those areas of the model.

A small number of elements with error values less than 1°C does not indicate a problem. A high number of elements with error values less than 1°C or a small number of elements with error values greater than 1°C indicates the analysis could not find a stable solution for those elements.

Things to look for

• Check the geometry in the problem area, as high aspect ratio elements can cause Cool analysis errors.
• Modeling problems, such as cooling channels being too close together, or elements being too close to each other can also cause problems with convergence in the Cool analysis. Check the model in the problem area to see if this is the cause.

Note: Decreasing the number of mold temperature iterations or slightly increasing the convergence tolerance can help the numerical method used in convergence to achieve the results. These alterations are recommended only as a last resort.