TURB_DITTUS

This function computes turbulent internal-flow Nusselt number using the Dittus–Boelter correlation. Optional flags select heating versus cooling exponent behavior and revised versus original coefficient forms.

Excel Usage

=TURB_DITTUS(Re, Pr, heating, revised)

Re (float, required): Reynolds number (-).
Pr (float, required): Prandtl number (-).
heating (bool, optional, default: true): Whether the flow is being heated (-).
revised (bool, optional, default: true): Whether to use the revised coefficients (-).

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

Example 1: Dittus-Boelter default coefficients

Inputs:

Re	Pr
100000	1.2

Excel formula:

=TURB_DITTUS(100000, 1.2)

Expected output:

247.4

Example 2: Dittus-Boelter cooling case

Inputs:

Re	Pr	heating
100000	1.2	false

Excel formula:

=TURB_DITTUS(100000, 1.2, FALSE)

Expected output:

242.931

Example 3: Dittus-Boelter original coefficients

Inputs:

Re	Pr	revised
200000	0.7	false

Excel formula:

=TURB_DITTUS(200000, 0.7, FALSE)

Expected output:

366.834

Example 4: Dittus-Boelter cooling original

Inputs:

Re	Pr	heating	revised
50000	2	false	false

Excel formula:

=TURB_DITTUS(50000, 2, FALSE, FALSE)

Expected output:

187.383

Python Code

Show Code

from ht.conv_internal import turbulent_Dittus_Boelter as ht_turbulent_Dittus_Boelter

def turb_dittus(Re, Pr, heating=True, revised=True):
    """
    Calculate turbulent Nusselt number using Dittus-Boelter.

    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 (-).
        heating (bool, optional): Whether the flow is being heated (-). Default is True.
        revised (bool, optional): Whether to use the revised coefficients (-). Default is True.

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

Online Calculator

Re *

Reynolds number (-).

Pr *

Prandtl number (-).

heating

Whether the flow is being heated (-).

revised

Whether to use the revised coefficients (-).