ENTRANCE_SHARP

Returns the minor-loss coefficient for a sharp-edged pipe entrance using a selected reference method.

Most methods provide near-constant values (commonly around K\approx0.5), while some references use slightly different constants for conservative design.

The output is a dimensionless entrance-loss coefficient suitable for pressure-drop estimation.

Excel Usage

=ENTRANCE_SHARP(ent_sharp_method)

• ent_sharp_method (str, optional, default: “Rennels”): Calculation method - Rennels, Swamee, Blevins, Idelchik, Crane, or Miller

Returns (float): Loss coefficient K for the sharp entrance [-]

Example 1: Default Rennels method

Inputs:

ent_sharp_method
Rennels

Excel formula:

=ENTRANCE_SHARP("Rennels")

Expected output:

0.57

Example 2: Swamee method returns 0.5

Inputs:

ent_sharp_method
Swamee

Excel formula:

=ENTRANCE_SHARP("Swamee")

Expected output:

0.5

Example 3: Blevins method returns 0.5

Inputs:

ent_sharp_method
Blevins

Excel formula:

=ENTRANCE_SHARP("Blevins")

Expected output:

0.5

Example 4: Miller method returns approximately 0.51

Inputs:

ent_sharp_method
Miller

Excel formula:

=ENTRANCE_SHARP("Miller")

Expected output:

0.509268

Python Code

Show Code

from fluids.fittings import entrance_sharp as fluids_entrance_sharp

def entrance_sharp(ent_sharp_method='Rennels'):
    """
    Calculate the loss coefficient (K) for a sharp entrance to a pipe flush with a reservoir wall.

    See: https://fluids.readthedocs.io/fluids.fittings.html#fluids.fittings.entrance_sharp

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

    Args:
        ent_sharp_method (str, optional): Calculation method - Rennels, Swamee, Blevins, Idelchik, Crane, or Miller Valid options: Rennels, Swamee, Blevins, Idelchik, Crane, Miller. Default is 'Rennels'.

    Returns:
        float: Loss coefficient K for the sharp entrance [-]
    """
    try:
      result = fluids_entrance_sharp(method=ent_sharp_method)
      return float(result)
    except Exception as e:
      return f"Error: {str(e)}"

Online Calculator

ent_sharp_method Optional Rennels Swamee Blevins Idelchik Crane Miller

Calculation method - Rennels, Swamee, Blevins, Idelchik, Crane, or Miller