HEDH_MONTINSKY

This function estimates critical heat flux in nucleate boiling with the HEDH-Montinsky relation from saturation and critical pressures.

The correlation is commonly written as:

q_c = 367P_cP_r^{0.35}(1-P_r)^{0.9}

It provides a pressure-based estimate of peak nucleate-boiling heat flux before transition toward film boiling.

Excel Usage

=HEDH_MONTINSKY(P, Pc)

• P (float, required): Saturation pressure of fluid (Pa).
• Pc (float, required): Critical pressure of fluid (Pa).

Returns (float): Critical heat flux (W/m^2), or an error message if invalid.

Example 1: Reference case from handbook

Inputs:

P	Pc
310300	2550000

Excel formula:

=HEDH_MONTINSKY(310300, 2550000)

Expected output:

398406

Example 2: Lower saturation pressure

Inputs:

P	Pc
150000	2550000

Excel formula:

=HEDH_MONTINSKY(150000, 2550000)

Expected output:

328740

Example 3: Higher saturation pressure

Inputs:

P	Pc
800000	2550000

Excel formula:

=HEDH_MONTINSKY(800000, 2550000)

Expected output:

444474

Example 4: Mid range saturation pressure

Inputs:

P	Pc
400000	2550000

Excel formula:

=HEDH_MONTINSKY(400000, 2550000)

Expected output:

419707

Python Code

Show Code

from ht.boiling_nucleic import HEDH_Montinsky as ht_HEDH_Montinsky

def HEDH_Montinsky(P, Pc):
    """
    Compute nucleate boiling critical heat flux using the HEDH-Montinsky correlation.

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

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

    Args:
        P (float): Saturation pressure of fluid (Pa).
        Pc (float): Critical pressure of fluid (Pa).

    Returns:
        float: Critical heat flux (W/m^2), or an error message if invalid.
    """
    try:
        return ht_HEDH_Montinsky(P=P, Pc=Pc)
    except Exception as e:
        return f"Error: {str(e)}"

Online Calculator

P *

Saturation pressure of fluid (Pa).

Pc *

Critical pressure of fluid (Pa).