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M-Star CFD documentation
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Getting Started

  • Introduction
    • Modeling Your First Process
  • Installation
    • System Requirements
    • Hardware Guide
    • Platform Diagnostics
    • Windows
    • Linux (Single Node)
    • Linux (Multi Node)
    • AWS
      • AWS Prerequisites
      • AWS (Linux)
      • AWS Advanced (EFS, PCluster, NICE DCV)
    • Azure
    • Google Cloud
    • Containers
      • Singularity
      • M-Star CFD Docker Container
    • Python Install
    • FFmpeg Linux Install
    • Remote Visualization (NICE DCV)
    • Windows Python Setup Guide
    • Troubleshooting M-Star Pre/Post start up
  • Licensing
    • Workstation License
    • Floating/Network License
    • M-Star License Utility
  • Tutorials
    • Simple Agitated Tank
    • Free Surface Dynamics
    • Particle Blending and Suspension Modeling
    • Recirculation Systems
    • Sloshing Systems
    • Tanks with Inlets and Outlets
    • Importing CAD Geometry
    • Predicting Forces and Torques
    • Zonal Analysis
    • Types of Averaging
    • Predicting Forces on Solid Bodies
    • On and Off Lattice Boundary Conditions
    • Computed Velocity
    • Residence Time Distribution
    • Buffer length
    • Using the Aggregator Tool
    • Introduction to M-Star Post
    • Working with Slices in M-Star Post
    • Working with Volumes in M-Star Post
    • Selecting Surfaces for Boundary Conditions
    • Gas Induction Modeling
    • Python Annotation in M-Star Post
  • How-To Guides
    • Modeling Chemical Reactions
    • Cooling and Dilution
    • Choosing a Simulation Resolution: Agitated Tanks
    • Loading Initial State
    • Predicting mass transfer (kLA) in gasified bioreactors
    • Mixing Bioreactors with Bottom Mounted Impellers
    • Computing Blend Time on any Model
    • Duplicate Object Pattern
    • Viewing Panel Functions
    • Custom Rheology in T-Junction Pipe
    • Custom Particle Variables
    • Simple Controller Tutorial
    • Python Overview
    • Python Model Properties
    • Optimization Example
    • Mixing Tank Example
    • Python CLI Example
    • Tutorial for Optimizer: Complex
    • Tutorial for Optimizer: Simple
  • Knowledge Base
    • Warnings and Errors
      • “No Fluid” Related Errors
    • M-Star Pre or Post does not start up on AWS on a Windows instance
    • CUDA-aware MPI
    • NVRTC compilation error (Linux)
    • Understanding GPU peer access
    • Solver start up delay

M-Star Pre

  • Overview
    • Menu
      • CAD Assembly Explorer
      • Preferences
    • Toolbar
    • Context-Specific Toolbar
      • Add Child Fill Point
      • Add Geometry
      • Add Particle Injection
      • Add Scalar Injection
      • Create Inlet Form
      • Cut Form
      • Define Axis Form
      • Deformation Form
      • Diagnostics Form
      • Edit Boundary Conditions Table
      • Edit Box Form
      • Edit Fill Points Form
      • Edit Height Form
      • Edit Mesh Form
      • Edit Table
      • Explode Geometry Form
      • Flip
      • Inlet/Outlet Setup Form
      • Mate Form
      • Moments Form
      • Move Form
      • Preview Flow Form
      • Recenter
      • Reset Form
      • Reset Box
      • Rotate Form
      • Scale Form
      • Set Internal Point Form
      • Volume Calculator
    • Navigation Icons
    • Viewing Panel
    • Log Window
    • Program Information
    • GUI Command Line Arguments
  • Model Tree
    • Simulation Parameters
    • Fluid Configuration
    • Main Lattice
      • External Accelerations
  • Child Geometry
    • Parametric Geometry
      • Parametric Impellers
      • Parametric Miscellaneous
      • Parametric Moving Geometry
      • Parametric Pipes
      • Parametric Primitives
      • Parametric Tanks
    • Non-Parametric Geometry Catalog
  • Fluid
    • Single Phase
    • Free Surface
    • Immiscible Two Fluid
    • Background Fluid
    • No Fluid
    • Newtonian
    • Power-law
    • Carreau
    • Cross
    • Bingham Plastic
    • Custom Fluid
  • Create
    • Create: Fundamentals
      • Static Body
      • Moving Body
        • Motion Type
          • Motion Modifier Option
          • Driven Motion
      • Static Inlet Outlet
        • Boundary Condition Types
      • Moving Inlet Outlet
    • Create: Particles
      • Massless Tracers
      • Inertial Particles
      • Discrete Element Particles
      • Liquid Droplets
      • Gas Bubbles
    • Create: Lattice
      • Refinement Zone
      • Inclusion Zone
      • Fluid Screen
      • Porous Medium
      • Particle Sink
    • Create: Scalar
      • Scalar Field
        • Static Inlet Outlet Boundary Conditions
      • Particle Scalar
      • Fluid Reaction
      • Static Body Reaction
      • Particle Reaction
    • Create: Variables
      • Global Constants
      • Global Variable
      • Fluid Variable
      • Particle Variable
      • Static Body Variable
    • Create: Runtime
      • Custom Script
      • Control Loop
      • Statistic Filter
      • Event Detector
      • Lookup Table
      • UDF Library
      • UDF Region
    • Create: Thermal
      • Thermal
      • Static Body Conduction
      • Conduction Volume Boundary Conditions
      • Conduction Surface Boundary Conditions
      • Thermal Contact
    • Create: Output
      • Probe
      • Probe Array
      • Output Line
      • Output Planes
      • Control Volume
      • Output Control Panel
      • Output Data Structure
    • Create: Analysis
      • Output Surface
      • Isosurface
      • Zonal Analysis
      • Mean Age
      • Histogram
  • Output
  • Check
    • Check Model
    • Preview Lattice
    • Preview Surface Meshes
    • Preview Motions
    • Preview Solver Output Files
  • Solve
    • Run Solver
    • Run Auto Resolver
    • Add Parameter Sweep to Solver Queue
    • Add to Solver Queue
  • UDFs and Tables
    • UDF/Table Editor
    • System UDF
    • Local UDF
    • Two-Column Tables
    • Multi-Column Table

M-Star Solve

  • Running the Solver
    • Standard Solver GUI
    • Solver Command Line Interface
    • M-Star Queue
    • M-Star Resolver
    • M-Star Optimizer
    • How to use Restart Initialization
  • Workflow and Integration
    • Parameter Sweeps
    • Global Scripts
    • Volume Fill Utility

M-Star Post

  • Post Processing
    • M-Star Post Overview
      • Post Menu
      • Post Toolbar
      • Post Ray Tracing Toolbar
      • Post 3D Controls
      • Post Timestep Toolbar
      • Post Data Tree
      • Post 3D View
      • Post Output Messages
      • Post Property Panel
    • Output Aggregator
    • Output Manager
  • Scaling Performance

M-Star API

  • Python Pre API
    • Examples
      • Command Line Example
      • Optimize Blend Time
      • Mixing Tank
      • Simple Case
      • Python Parameter Sweep
      • Workflow Parameter Sweep
      • Scripted CAD pre-processing with build123d
      • Sweep over CAD files
      • Sweep over CAD files + 1D parameter sweep
    • Installation
    • Module functions
    • Model
    • Components
    • Properties
    • Mesh Settings
    • Output
    • Foundation Classes
    • Initial State

More Resources

  • Validation / Literature
    • Flow in the Trailing Vortex of an Impeller
  • Theory
    • Theory and Implementation
    • Large Eddy Simulation Review
    • Porous Medium Review
    • Nearest Neighbor Distribution
  • Architecture Technical Overview
    • Data Flow
    • Software Architecture
    • Technical Diagrams
    • Quality/Security Assurance
  • Webinars
  • References
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“No Fluid” Related Errors¶

The “No Fluid” fluid type is a special fluid type that is used to indicate that a fluid is not present in a system. Appropriate for conduction heat transfer systems where fluid mechanics are not pertinent.

If the any of the following errors are encountered, the “No Fluid” fluid type has been used inappropriately. If the system being modeled only has DEM particles, consider the selection background fluid. Otherwise, consider the appropriate fluid model.

  • Inlets/outlets cannot be used with this fluid model

  • Scalarfield cannot be used with this fluid model

  • Refinement meshes cannot be used with this fluid model

  • Custom variable cannot be used with this fluid model

  • Mean age cannot be used with this fluid model

  • Reactions cannot be used with this fluid model

  • Fluid model does not support two way coupling with particles

  • Fluid model does not support lift on particles

  • Fluid model does not support pressure gradient on particles

  • Fluid model does not support mass transfer rate on particles

  • Fluid model does not support bubble pressure on …

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