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1.2.1 Solver Changes that Affect Results - Cooling Systems and Thermal Management The following list comprises the most significant code changes made to V7.0 which may impact results.
It is recommended to review the following list to understand which changes may have an impact on a given model, as not each of the changes below will impact all models. Understand also that a combination of changes may affect a model without any way of generalizing what direction results may change.
• 'ValveThermostatMConn' and 'ValveThermostatSConn': The minimum lift opening was changed from 1.0e-5 mm to 1.0e-15 mm. A minimum lift opening of 1.0e-5 mm instead of 0 mm will yield the same results as in V6.2. • 'Valve*Conn' and 'BallValveConn' with Liquid Flow: An improvement was made to the calculation of pressure recovery in valve connections with liquid flows. The change in results increases with increasing pressure drop and is also affected by area ratio (square of effective diameter of valve relative to downstream flow part diameter). The change in results is maximized at area ratios of 0.5 and is 0 at area ratios of 0 and 1. For a given pressure drop the flow rate in V7.0 will be equal to or larger than 6.2.
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