Evaluating the Bulk Temperature
In a nonisothermal flow, the bulk temperature is an average temperature, taking into account the velocity field in the cross section of the flow. It can be evaluated in post processing, to estimate the heat transfer coefficient over a wall along the flow main direction.
This chapter describes how to evaluate the bulk temperature in 3D and 2D models, using the built-in geometry variables and operators. The nonisothermal flow is supposed to take place along a tube, with any orientation and curvature, even though the bulk temperature may be defined in other geometries. It contains the following sections:
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Bulk Temperature Definition
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Evaluation of the Bulk Temperature in 3D Models
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Evaluation of the Bulk Temperature in 2D Models