ACU-T: 4200 Humidity – Pipe Junction
Prerequisites
This tutorial provides the instructions for setting up and running a basic transient humidity transport simulation using a pipe junction model. Prior to starting this tutorial, you should have already run through the introductory tutorial, ACU-T: 1000 Basic Flow Set Up, and have a basic understanding of HyperMesh CFD and AcuSolve. To run this simulation, you will need access to a licensed version of HyperMesh CFD and AcuSolve.
Problem Description
The problem to be addressed in this tutorial is shown schematically in Figure 1. As an example, a pipe junction problem is attached here to show the capability of the Humidity modelling in AcuSolve. In this problem, there are two inlets with different flow, thermal, and humidity conditions. As the flow proceeds downstream of the pipe, two pipes merge into a single pipe to create a single outlet and a distinct profile of temperature and humidity is attained. The geometry is symmetric about the XZ midplane of the pipe, as shown in the figure.
Start HyperMesh CFD and Open the HyperMesh Database
Validate the Geometry
The Validate tool scans through the entire model, performs checks on the surfaces and solids, and flags any defects in the geometry, such as free edges, closed shells, intersections, duplicates, and slivers.
Set Up Flow
Set Up the Simulation Parameters and Solver Settings
Define Flow Boundary Conditions
Compute the Solution
The input HyperMesh database contains the mesh, hence you do not need to generate the mesh again.
Define the Nodal Initial Conditions
Run AcuSolve
Post-Process the Results with HM-CFD Post
In this step, you will create contour plots for temperature, relative humidity, mass fraction humidity, and velocity.
Summary
In this tutorial, you learned how to set up and solve a humidity transport simulation using HyperMesh CFD and AcuSolve. You started by importing the HyperMesh CFD input database and then defined the flow setup. Once the solution was computed, you created a contour plot of temperature distribution, relative humidity, humidity mass fraction, and velocity using HyperMesh CFD Post.