TURB_DREXEL

This function computes turbulent pipe-flow Nusselt number using the Drexel–McAdams correlation. It provides a compact Reynolds–Prandtl relation commonly applied to low-Prandtl-number gas-flow heat transfer.

Excel Usage

=TURB_DREXEL(Re, Pr)

Re (float, required): Reynolds number (-).
Pr (float, required): Prandtl number (-).

Returns (float): Turbulent Nusselt number for pipe flow (-).

Example 1: Drexel-McAdams example

Inputs:

Re	Pr
100000	0.6

Excel formula:

=TURB_DREXEL(100000, 0.6)

Expected output:

171.191

Example 2: Lower Prandtl number

Inputs:

Re	Pr
80000	0.5

Excel formula:

=TURB_DREXEL(80000, 0.5)

Expected output:

133.131

Example 3: Higher Reynolds number

Inputs:

Re	Pr
300000	0.7

Excel formula:

=TURB_DREXEL(300000, 0.7)

Expected output:

438.486

Example 4: Mid Reynolds number

Inputs:

Re	Pr
150000	0.65

Excel formula:

=TURB_DREXEL(150000, 0.65)

Expected output:

244.488

Python Code

Show Code

from ht.conv_internal import turbulent_Drexel_McAdams as ht_turbulent_Drexel_McAdams

def turb_drexel(Re, Pr):
    """
    Calculate turbulent Nusselt number using Drexel-McAdams.

    See: https://ht.readthedocs.io/en/latest/ht.conv_internal.html

    This example function is provided as-is without any representation of accuracy.

    Args:
        Re (float): Reynolds number (-).
        Pr (float): Prandtl number (-).

    Returns:
        float: Turbulent Nusselt number for pipe flow (-).
    """
    try:
        return ht_turbulent_Drexel_McAdams(Re=Re, Pr=Pr)
    except Exception as e:
        return f"Error: {str(e)}"

Online Calculator

Re *

Reynolds number (-).

Pr *

Prandtl number (-).