Transport Package

The transport package provides comprehensive modeling capabilities for fluid and material transport systems in process control applications. This package contains models for continuous and batch transport operations across different phases and flow regimes.

Note

This is part of the modern modular structure of SPROCLIB. The transport package includes advanced physics-based models for process engineering applications.

Transport Operations:

Package Overview

The transport package is organized by operational mode and provides comprehensive modeling for:

Continuous Transport Operations:

Liquid Transport - PipeFlow, PeristalticFlow, SlurryPipeline
Solid Transport - PneumaticConveying, ConveyorBelt, GravityChute, ScrewFeeder

Batch Transport Operations:

Liquid Transfer - BatchTransferPumping
Solid Handling - DrumBinTransfer, VacuumTransfer

All transport models inherit from the ProcessModel base class and provide both steady-state and dynamic analysis capabilities for comprehensive system characterization.

Transport

Continuous Liquid Transport

Continuous Solid Transport

Batch Liquid Transport

BatchTransferPumping

Batch Solid Transport

Analysis Functions

Detailed Model Documentation

Single-Phase Pipeline Flow

See detailed documentation: PipeFlow Class

The PipeFlow class implements comprehensive pipeline transport modeling for clean liquids using the Darcy-Weisbach equation and friction factor correlations. Features include pressure drop calculations, Reynolds number analysis, temperature-dependent properties, and multiple friction factor correlations.

Positive Displacement Pumping

See detailed documentation: PeristalticFlow Class

The PeristalticFlow class models peristaltic pump systems for precise fluid metering and chemical transfer applications. Features include precise flow control, pulsation analysis, backpressure compensation, and tube wear modeling.

Multiphase Slurry Transport

See detailed documentation: SlurryPipeline Class

The SlurryPipeline class provides multiphase transport modeling for solid-liquid slurry systems. Features include critical velocity prediction, particle settling effects, multiphase pressure drop calculations, and operating envelope determination.

Batch Liquid Transfer

See detailed documentation: BatchTransferPumping

The BatchTransferPumping class models batch liquid transfer operations using pumps with comprehensive hydraulic analysis. Features include batch volume control, transfer time optimization, pump performance integration, and level control capabilities.

Quick Usage Examples

Continuous Transport

Pipeline Flow Analysis:

from transport.continuous.liquid import PipeFlow

# Create pipeline model
pipe = PipeFlow(
    pipe_length=1000.0,      # 1 km pipeline
    pipe_diameter=0.2,       # 20 cm diameter
    roughness=1e-4,          # Commercial steel
    elevation_change=50.0    # 50 m elevation gain
)

# Steady-state analysis
result = pipe.steady_state([300000, 293.15, 0.05])  # [P_in, T_in, Q]
P_out, T_out = result

Slurry Transport Design:

from transport.continuous.liquid import SlurryPipeline

# Create slurry pipeline model
slurry = SlurryPipeline(
    pipe_length=5000.0,      # 5 km pipeline
    pipe_diameter=0.3,       # 30 cm diameter
    particle_diameter=0.001, # 1 mm particles
    solid_density=2650.0,    # Sand particles
    fluid_density=1000.0     # Water carrier
)

# Critical velocity analysis
result = slurry.steady_state([400000, 0.15, 2.5])  # [P_in, C_in, v]
P_out, C_out, v_critical = result

Batch Transport

Batch Liquid Transfer:

from transport.batch.liquid import BatchTransferPumping

# Create batch transfer model
transfer = BatchTransferPumping(
    tank_volume=2.0,         # 2 m³ source tank
    transfer_volume=0.5,     # 500 L batch size
    pump_capacity=0.01,      # 10 L/s pump
    pipe_length=50.0         # 50 m transfer line
)

# Batch transfer analysis
result = transfer.steady_state([0.5, 101325, 293.15])  # [volume, pressure, temp]
transfer_time, accuracy, residual_volume = result

Batch Solid Transfer:

from transport.batch.solid import DrumBinTransfer

# Create drum transfer model
drum_transfer = DrumBinTransfer(
    drum_capacity=0.2,       # 200 L drum
    discharge_diameter=0.1,  # 10 cm outlet
    material_density=1200.0, # Bulk density
    angle_of_repose=35.0     # Material flow property
)

# Discharge analysis
result = drum_transfer.steady_state([0.15, 0.8, 9.81])  # [fill_level, valve_opening, gravity]
discharge_rate, empty_time, flow_pattern = result

Advanced Applications

Integrated Transport Systems

Combining multiple transport models for complex process systems:

from transport.continuous.liquid import PipeFlow
from transport.batch.liquid import BatchTransferPumping

# Multi-phase process with different transport mechanisms
class IntegratedProcess:
    def __init__(self):
        # Continuous liquid transport
        self.liquid_line = PipeFlow(pipe_length=500, pipe_diameter=0.2)

        # Batch transfer system
        self.batch_transfer = BatchTransferPumping(tank_volume=5.0, transfer_volume=1.0)

    def process_cycle(self, liquid_flow, batch_volume):
        # Coordinate transport operations
        liquid_result = self.liquid_line.steady_state([200000, 293.15, liquid_flow])
        batch_result = self.batch_transfer.steady_state([batch_volume, 101325, 293.15])

        return {
            'liquid_pressure_drop': liquid_result[0] - 200000,
            'batch_transfer_time': batch_result[0]
        }

Process Control Integration

Transport models with control system design:

from transport.continuous.liquid import PipeFlow
from utilities.control_utils import tune_pid
from simulation.process_simulation import ProcessSimulation

# Create controlled transport process
pipeline = PipeFlow(pipe_length=2000, pipe_diameter=0.25)

# Design flow controller
process_params = {'K': 1e-6, 'tau': 30.0, 'theta': 5.0}
pid_params = tune_pid(process_params, method='ziegler_nichols')

# Run closed-loop simulation
sim = ProcessSimulation(pipeline, controller_params=pid_params)
results = sim.run(time_span=3600)