From the graph, it can be seen that as the mass flow rate increases, the Nu of both heaters shows an upward trend, and the thermal resistance coefficient also shows a decreasing trend.
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Thermal fluid coupling simulation and optimization of downhole baffle heater adapted to Tar-rich Coal in-situ pyrolysis.
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The sentences
With the increase of mass flow rate, the surface heat transfer coefficients of both heaters show an increasing trend.