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Injection Molding Runner Pressure Drop (Power Law Shear-Thinning) Calculator

Easily calculate and compute injection molding runner pressure drop (power law shear-thinning) calculator with accurate equations, live formulas, and expert guidance.

Total injection flow rate per runner channel.

Cross-sectional radius of circular delivery runner.

Total length of runner branch.

Ostwald-de Waele flow consistency parameter.

Pseudoplastic power law exponent (n < 1 for shear-thinning).

Calculated Result
82.7 bar

Runner Pressure Drop

Runner Pressure Drop

82.7 bar

Pressure Drop Bar

82.7

Pressure Drop M Pa

8.27

Wall Shear Rate S1

1956.8

Wall Shear Stress K Pa

120.6

82.7 — bar

Calculation Breakdown

  1. Applied FormulaCalculates the viscous pressure drop through a cylindrical runner channel for a shear-thinning pseudoplastic polymer melt obeying the Ostwald-de Waele power law.\Delta P = \frac{2L}{R} \tau_w = \frac{2L K}{R} \left( \frac{3n+1}{4n} \frac{4Q}{\pi R^3} \right)^n

Runner Pressure Drop Metric Output

Interactive visualization based on your current inputs

Calculated Value
0.021416283Runner Pressure Drop

What Is the Injection Molding Runner Pressure Drop (Power Law Shear-Thinning) Calculator?

This tool computes injection molding runner pressure drop (power law shear-thinning) calculator with high precision arithmetic.

How Does the Injection Molding Runner Pressure Drop (Power Law Shear-Thinning) Calculator Work?

Calculates the viscous pressure drop through a cylindrical runner channel for a shear-thinning pseudoplastic polymer melt obeying the Ostwald-de Waele power law.

Injection Molding Runner Pressure Drop (Power Law Shear-Thinning) Calculator Formula & Variables

The core mathematical equation utilized by this calculator is expressed as:

ΔP=2LRτw=2LKR(3n+14n4QπR3)n\Delta P = \frac{2L}{R} \tau_w = \frac{2L K}{R} \left( \frac{3n+1}{4n} \frac{4Q}{\pi R^3} \right)^n

Calculates the viscous pressure drop through a cylindrical runner channel for a shear-thinning pseudoplastic polymer melt obeying the Ostwald-de Waele power law.

How to Use the Injection Molding Runner Pressure Drop (Power Law Shear-Thinning) Calculator

  1. Enter your parameters into the designated input fields to calculate the result immediately.

Step-by-Step Example Calculation

Injection Molding Runner Pressure Drop (Power Law Shear-Thinning) Calculator Example

Input Values:

flowRateQcm3S:45.0
runnerRadiusRmm:3.5
runnerLengthLMm:120.0
consistencyIndexKPaSn:8500.0
powerLawIndexN:0.35
Worked Steps: Sample evaluation based on standard reference conditions.

Understanding Your Result

The calculated primary figure indicates the optimal or required bar.

Factors That Affect the Result

  • Measurement tolerances, operational variance, and real-world conditions.

When Should You Use This Calculator?

  • Everyday budgeting, technical homework, professional estimation, and household projects.

Assumptions & Limitations

  • Assumes standard atmospheric or environmental parameters unless specified.

Frequently Asked Questions

Calculation Accuracy & Reference Note

Double-precision IEEE 754 arithmetic with validated empirical constants.

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