PM Corner - Zero Flow Heat Transfer
Live webinar: Friday, 30th September 2011, 3pm (BST)

Zero Flow Heat Transfer

Date: Friday, 30th September 2011
Time: 3pm (BST)
Duration: 1 hour (approx.)

The ZFHT enhancement will provide Automotive vehicle engineers with the capability to model "rapid warm-up" cooling strategies where zero coolant flow is present during some part of the engine warm-up process. The key changes from V7.8.1 will be as follows:

Enabling heat transfer analysis in networks (or in branches thereof) that contain commonly used cooling system components:

Where flow conditions are below the Minimum Flow Tolerance set by the user, or are below the minimum threshold of 1e-06 kg/s.

Including both ‘Axial HT’(2) between components, and ‘Radial HT’(3) in individual components.

And with provision for user definable Heat Transfer Coefficients (HTC) for the respective convective(4) paths.

Providing automatic:

Recognition of a "zero-flow" condition, i.e. no requirement for the user to individually set components to zero-flow.

Transition based on Reynolds Number, from "zero-flow" to "low-flow" regimes and vice-versa.

N.B. The ZFHT capability is currently awaiting validation. At V7.8.2, the ZFHT capability will therefore only be an option that users can enable with the approval of the relevant Sales Office and the Ground Transportation Product Manager.

(2) Axial HT denotes ‘fluid cell to fluid cell’ heat transfer

(3) Radial HT denotes fluid to wall’ and ‘wall to external’ heat transfer

(4) Conduction is automatically calculated and accounted for in the total value of reported Axial HT
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