ENTRANCE_ANGLED

Overview

Calculate the loss coefficient (K) for an angled sharp entrance to a pipe flush with a reservoir wall.

Excel Usage

=ENTRANCE_ANGLED(angle)

• angle (float, required): Angle of inclination (90° = straight, 0° = parallel), [degrees]

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

Examples

Example 1: 30 degree angle entrance

Inputs:

angle
30

Excel formula:

=ENTRANCE_ANGLED(30)

Expected output:

Result
0.9798

Example 2: 45 degree angle entrance

Inputs:

angle
45

Excel formula:

=ENTRANCE_ANGLED(45)

Expected output:

Result
0.8821

Example 3: 60 degree angle entrance

Inputs:

angle
60

Excel formula:

=ENTRANCE_ANGLED(60)

Expected output:

Result
0.77

Example 4: 90 degree (straight) entrance

Inputs:

angle
90

Excel formula:

=ENTRANCE_ANGLED(90)

Expected output:

Result
0.57

Python Code

import micropip
await micropip.install(["fluids"])
from fluids.fittings import entrance_angled as fluids_entrance_angled

def entrance_angled(angle):
    """
    Calculate the loss coefficient (K) for an angled sharp entrance to a pipe flush with a reservoir wall.

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

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

    Args:
        angle (float): Angle of inclination (90° = straight, 0° = parallel), [degrees]

    Returns:
        float: Loss coefficient K for the angled entrance [-]
    """
    try:
        angle = float(angle)
    except (ValueError, TypeError):
        return "Error: Angle must be a number."

    if angle < 0 or angle > 90:
        return "Error: Angle must be between 0 and 90 degrees."

    try:
        result = fluids_entrance_angled(angle=angle, method='Idelchik')
        return float(result)
    except Exception as e:
        return f"Error: {str(e)}"

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