Simulation Software for Fluids and SolidsSimulation spiral or screw stirrer
Figure 1: CAD model created in NOGRID's COMPASS
Figure 2: Setup the mixing case within NOGRID points' GUI
Figure 3: Results of mixing with spiral screw stirrer displayed in NOGRID points' GUI
Figure 4: Mixing simulation in NOGRID points software: velocity field and free surface for spiral screw stirrer
The simulation of mixing in a spiral or screw stirrer can be easily performed using NOGRID points CFD software.
In this case study, the spiral or screw stirrer is an axially conveying type, typically used for highly viscous media. The containers used with such agitators often vary in slenderness and bottom geometry. The paddle stirrer in this example features a flat-bottomed vessel and is therefore suitable only for non-pressurized mixing processes. Slim, tall containers - such as the one in this study - are usually designed for handling large volumes. The spiral or screw stirrer generates a strong conveying effect in the axial direction.
Mixing plays a key role in the food and chemical industries and is involved in processes such as the dispersion of two or more liquid, powdery or gaseous components, deagglomeration to prevent lump formation, and the homogenization of mixtures.
Improve product performance and reduce costs
Mixing simulation help you better understand flow behavior inside an agitator, quickly identify potential improvements in design and operating parameters, and reduce both production and maintenance costs.
Compute any conceivable agitator geometry with mixing simulation
NOGRID offers a wide range of rheology models, including those commonly used in the chemical industry. Its unique capabilities for handling moving parts within the fluid domain make it possible to simulate virtually any agitator geometry and operating mode, such as:
- rotating and counterwise rotating agitator blades, possibly moving up and down periodically at the same time
- overlapping operation ranges of moving parts as found in twin-screw agitators
- free surfaces at inlets or for different fluid levels or for fast rotating agitators with high centrifugal forces
Benefit from very short computation times
One of the key strengths of NOGRID's meshless CFD software is its rapid preprocessing - no mesh generation is required - and its exceptionally short computation times, even for complex moving parts commonly found in agitators.
Capabilities of NOGRID points CFD software
NOGRID combines capabilities to handle free surface flow and moving parts within the domain. This leads to the following advantages:
- fully 3D computation solving the complete Navier-Stokes equations
- easy and intuitive setup also for FSI (Fluid-Structure-Interaction) cases
- freely definable material properties by equations or curves
- evaluation of the mixing quality
- open or closed domains including inflow and outflow areas (non-batch mode)
- moving of mixers in any direction
Why choose Nogrid?
NOGRID provides professional CFD software for the simulation of fluid flow, heat and mass transfer, and chemical reactions. Its efficient modelling workflow helps engineers analyse flow behaviour, evaluate designs and make informed decisions without creating a conventional volume mesh.
Faster model preparation
With NOGRID, only the geometry boundary needs to be meshed. The finite points inside the fluid domain are generated automatically according to user-defined settings, both at the start of the simulation and during the calculation.
This approach reduces preprocessing effort and makes it easier to prepare complex geometries and cavities for simulation.
Efficient CFD workflow
The modelling process follows four straightforward steps:
Build the geometry. Mesh the boundary. Define the simulation. Start the calculation.
NOGRID is designed to provide short computation times, including for applications involving complex cavities. Engineers can use the resulting data to examine flow distribution and other relevant flow characteristics.
Better insight into fluid-flow processes
CFD solves the fundamental equations governing fluid flow. NOGRID software enables engineers to predict and analyse the behaviour of fluids and related physical processes before or alongside physical testing.
The simulation results can support:
- evaluation and comparison of design alternatives
- optimisation of construction and operating parameters
- improved planning reliability
- reduction of development time and testing effort
- faster progression from design to market or operation
Steps from geometry generation to simulation results
TRAINING
Our two-day training courses teach participants how to set up, run and evaluate simulations efficiently with NOGRID CFD software. The courses include practical guidance for handling different types of simulation cases.
For more details please refer to Training Courses →
Technical Support
Professional support is available from the beginning of your work with NOGRID. Our technical team assists users by telephone and email with software operation, case setup and simulation-related questions.
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Simulation Service
When internal time, expertise or resources are limited, NOGRID can support your project with individual numerical simulation services. Our engineers develop and evaluate CFD models based on the specific requirements of your application.
For more details please refer to Software Support →