NU_HORZ_TURB_KREITH

This function computes the turbulent flat-plate Nusselt number for an isothermal plate using the Kreith correlation with Reynolds and bulk Prandtl inputs.

Nu_L = 0.036Re_L^{0.8}Pr^{1/3}

Excel Usage

=NU_HORZ_TURB_KREITH(Re, Pr)

Re (float, required): Reynolds number with respect to plate length (-).
Pr (float, required): Prandtl number at bulk temperature (-).

Returns (float): Nusselt number with respect to plate length (-).

Example 1: Kreith example case

Inputs:

Re	Pr
1030000	0.71

Excel formula:

=NU_HORZ_TURB_KREITH(1030000, 0.71)

Expected output:

2074.87

Example 2: Kreith at mid Reynolds

Inputs:

Re	Pr
500000	0.7

Excel formula:

=NU_HORZ_TURB_KREITH(500000, 0.7)

Expected output:

1158.36

Example 3: Kreith at high Prandtl

Inputs:

Re	Pr
1500000	10

Excel formula:

=NU_HORZ_TURB_KREITH(1500000, 10)

Expected output:

6768.76

Example 4: Kreith at high Reynolds

Inputs:

Re	Pr
3000000	1.2

Excel formula:

=NU_HORZ_TURB_KREITH(3000000, 1.2)

Expected output:

5812.91

Python Code

Show Code

from ht.conv_external import Nu_horizontal_plate_turbulent_Kreith as ht_Nu_horizontal_plate_turbulent_Kreith

def Nu_horz_turb_Kreith(Re, Pr):
    """
    Calculate the Nusselt number for turbulent flow across an isothermal flat plate using the Kreith correlation.

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

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

    Args:
        Re (float): Reynolds number with respect to plate length (-).
        Pr (float): Prandtl number at bulk temperature (-).

    Returns:
        float: Nusselt number with respect to plate length (-).
    """
    try:
        return ht_Nu_horizontal_plate_turbulent_Kreith(Re=Re, Pr=Pr)
    except Exception as e:
        return f"Error: {str(e)}"

Online Calculator

Re *

Reynolds number with respect to plate length (-).

Pr *

Prandtl number at bulk temperature (-).