1D duct flow networks

Use 1D duct flow networks to model any system of channels, pipes, or ducts that contain or direct a fluid. Duct flow networks are modeled using 1D equations.

Depending on your model physics, you can create duct flow networks as follows:

• Model fluid networks using 1D duct elements with defined cross sections to solve for pressure, velocity, mass flow, and temperature (1). 1D duct elements have a Duct or Duct Axisymmetric type of 1D duct mesh collector.

• Model fluid networks with fixed mass flows using 1D duct with mass flow elements to only solve for mass flow and temperature (2). 1D duct with mass flow elements have a Duct with Mass Flow or Duct with Mass Flow Axisymmetric type of 1D duct mesh collector.

• Model heat transfer across the duct wall using 1D duct with thick wall elements (3). 1D duct with thick wall elements have a Duct with Thick Wall type of 1D duct mesh collector.

• Model heat transfer across the duct wall using 1D elements for duct fluid and shells for duct walls (4). You model the heat transfer from the duct fluid to the wall using a Thermal Coupling — Convection simulation object. You can use any type of 1D duct mesh collector.

• Model heat transfer across the duct wall using 1D elements for duct fluid and 3D solid elements (5). You model duct convection with surrounding 3D elements using an Immersed Ducts simulation object. You can use Duct type of 1D duct mesh collector.

You define duct properties, inflow, and outflow using the Duct Flow Boundary Conditions simulation object.

How do I

Create a duct flow network

Create a thick wall duct flow network

Create a pressureless duct network

Create a duct flow network and model heat transfer using 2D shells

Create a duct flow network and model heat transfer using 3D solid elements

Connect the duct network to the 3D flow domain

Learn more

Duct analysis workflow

Duct Flow Boundary Conditions

1D meshing

Ensuring consistent 1D element orientation during mesh creation

Look up more details

Modeling ducts with 1D elements

Modeling ducts and their walls with 1D elements

Modeling ducts with 1D elements and their walls with 2D elements

Modeling the interface between ducts and 3D fluid elements

Modeling ducts inside 3D solid elements

Understanding ducts and area definition

Solver calculation for duct elements

Solver calculation for duct with mass flow elements

Quick links

Command reference

Pre/Post video examples

Bulk Entry Descriptions

Simcenter 3D tutorials

Browse Simcenter 3D help by product area

Simcenter 3D Thermal/Flow, Electronic Systems Cooling, and Space Systems Thermal boundary conditions

1D duct flow networks, Simcenter 3D 2021.1 Series

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