GasOptics

GasOptics is a Python library designed to calculate thermodynamic and transport properties of gases. With the introduction of the GasProperties class, the library now provides a streamlined interface for handling various gas properties under different conditions, along with robust unit conversion capabilities.

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What's New in Version 0.3.0

• The GasProperties Class:
  • Unified interface for calculating gas properties.
  • Dynamic updates to conditions without reinitialization.
  • Support for unit conversions using UnitConverter.
• Thermal Conductivity Calculations:
  • Added support for thermal conductivity (λ) calculations for gases and humid air.
• Enhanced Unit Handling:
  • Seamless input and output unit conversion for temperature, pressure, enthalpy, and more.
• Refactored Codebase:
  • Modularized structure for easier maintenance and extensibility.

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Features

The GasProperties Class

• Dynamic Property Calculations:
  • Specific Heat: ( C_p, C_v )
  • Density: ( \rho )
  • Dynamic Viscosity: ( \mu )
  • Enthalpy: ( h )
  • Entropy: ( s )
  • Heat Capacity Ratio: ( \gamma )
  • Thermal Conductivity: ( \lambda )
• Update Conditions Dynamically:
  • Change temperature, pressure, or relative humidity without reinitialization.
• Unit Conversion:
  • Flexible input and output unit handling for consistent results.

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Installation

Option 1: Install from PyPI

pip install gasoptics

Option 2: Install from Source

1. Clone the repository:

   git clone https://github.com/karimialii/gasoptics.git

2. Navigate into the project directory:

   cd gasoptics

3. Install the package:

   pip install .

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Requirements

• Python 3.x
• NumPy

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Usage

Using GasProperties

The GasProperties class provides a convenient interface to calculate various thermodynamic and transport properties of gases.

Example 1: Basic Usage

from gasoptics.properties import GasProperties

# Set global units
GasProperties.set_unit(T="C", p="bar", h="kJ")

# Create a GasProperties instance
props = GasProperties(T=25, p=1, RH=0.5, T_unit="C")  # 25°C, 1 bar, 50% RH

# Calculate properties
cp = props.cp()
rho = props.rho()
mu = props.mu()

print(f"Specific Heat (cp): {cp:.2f} kJ/kg·K")
print(f"Density (rho): {rho:.3f} kg/m³")
print(f"Viscosity (mu): {mu:.6f} Pa·s")

Example 2: Dynamic Updates

# Update conditions dynamically
props.update_conditions(T=30, p=1.5, RH=0.6, T_unit="C")

# Recalculate properties
cp_updated = props.cp()
rho_updated = props.rho()

print(f"Updated Specific Heat (cp): {cp_updated:.2f} kJ/kg·K")
print(f"Updated Density (rho): {rho_updated:.3f} kg/m³")

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Available Methods in GasProperties

Method	Description
cp()	Specific heat at constant pressure (( C_p )).
cv()	Specific heat at constant volume (( C_v )).
rho()	Density (( \rho )).
h()	Enthalpy (( h )).
s()	Entropy (( s )).
gamma()	Heat capacity ratio (( \gamma )).
k()	Thermal conductivity (( \lambda )).
mu()	Dynamic viscosity (( \mu )).

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Tests

Run the test suite to validate functionality:

pytest tests/

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Contributing

Contributions are welcome! Follow these steps to contribute:

1. Fork the repository.
2. Create a new branch:

   git checkout -b feature/your-feature

3. Make your changes and commit:

   git commit -am "Add new feature"

4. Push to your branch:

   git push origin feature/your-feature

5. Submit a pull request.

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License

This project is licensed under the MIT License - see the LICENSE file for details.

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