Simulation Mold Filling using a non-Newtonian Fluid

Figure 1: Animation mold filling using a non-Newtonian fluid

The simulation of the filling of a mold using a non-Newtonian fluid can be performed with NOGRID points CFD software.

The filling of a mold form with liquid polymer is a complicated fluid mechanical problem. The exact computation of the process can greatly help to understand deficiencies of the finished mold such as unfilled cavities, structural weaknesses e.g. due to inappropriate cooling down, air traps or misplaced or otherwise corrupted weld lines.

NOGRID points (a meshless CFD software) enables a fast computation of the free surface at the flow front in conjunction with the ability to incorporate complicated material properties and boundary conditions allow an in-depth analysis of this process.

The symmetric model shown above is computed without the use of symmetry. Nevertheless the two flow fronts meet exactly in the middle of the mold form. The viscosity of the polystyrene is determined by the Carreau model (i.e. it depends on the shear rate). The simulation can be used to study the flow at the entrance into the micro channel section and to understand the forming of the weld line at the center.

Capabilities of NOGRID points CFD software

NOGRID unites the capabilities to handle free surface flow and moving parts within the domain and allows the simulation of any conceivable geometry and operating mode, such as

fully 3D computation solving the complete Navier-Stokes equations
easy and intuitive setup
freely definable material properties by equations or curves also for non-Newtonian fluids
evaluation of chemical reactions and corresponding heat source terms
open or closed domains including inflow and outflow areas (non-batch mode)
moving of parts

Whitepaper Nogrid points Technology

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.

For more details please refer to Software Support →

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.