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Convective heat transfer coefficient vs. gas density (pressure)
While I am not being able to work the equations, let me rephrase the question a bit better. Given a heat exchanger surface and constant mass transfer rate (ie, 1 m2, 1 kg/s of air), does convective heat transfer coefficient change significantly with air density? Can a simple rule of thumb be...- pkv_eng
- Post #10
- Forum: Heat Transfer & Thermodynamics engineering
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Convective heat transfer coefficient vs. gas density (pressure)
AlmostRetired, ye, I am interested in heat transfer in heat exchangers (forced convection). I have seen many examples of conductive heat transfer examples here and there, but they never mention pressure, which I find puzzling. I am not interested in an specific pressure, just in the general...- pkv_eng
- Post #9
- Forum: Heat Transfer & Thermodynamics engineering
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Convective heat transfer coefficient vs. gas density (pressure)
1503-44, so, If I am understanding ok the Prandt number, Air heat transfer is dominated by thermal diffusivity (as air Prandt's number is 0.71). And that situation does not change with pressure, as I have seen in the formulas and tables. So I am checking thermal diffusivity of air at varying...- pkv_eng
- Post #4
- Forum: Heat Transfer & Thermodynamics engineering
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Convective heat transfer coefficient vs. gas density (pressure)
Hello, I am here to ask a simple, basic question about heat exchangers which is puzzling me. Whenever I look for approximated values for convective heat transfer coefficients, I just find tables depending of phase of matter (liquid/gas), type of flow (laminar/turbulent) or type of gas...- pkv_eng
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- Replies: 11
- Forum: Heat Transfer & Thermodynamics engineering
