Simulation PUR Foaming Cup

CAD model cup created in NOGRID's COMPASS

Figure 1: CAD model created in NOGRID's COMPASS

Setup PUR foaming case cup in NOGRID points CFD software's GUI

Figure 2: Setup the cup foaming case within the GUI

Simulation results cup PUR foaming: final density, computed with NOGRID points CFD software

Figure 3: Foaming state at a certain time step

Animation PUR foaming cup in NOGRID points CFD software

Figure 4: Animation of the cup PUR foaming process, color is density

The simulation of a PUR (polyurethane) foaming process of a cup can be accurately performed using NOGRID points CFD software.

Figure 4 shows the PUR foaming process of a cup in an open can, perforated by a small cylinder. Although, due to the symmetry only a quarter of the model would need to be simulated, we computed the case in full 3D. At the end of the foaming process, the mold overflows and forms the typical shape before the reaction finally stops. The purpose of simulating this simple geometry is to allow the results to be easily compared with experimental data.

NOGRID points helps to understand the flow inside the cavity, visualize air entrapment, display the foam density distribution of the insulation material, and determine the pressure exerted by the PUR foam on the cavity walls.

Capabilities of NOGRID points CFD software

NOGRID combines the capabilities to handle free-surface flows and moving parts within the computational domain, enabling the simulation of virtually any geometry and operating mode, such as

fully 3D computation solving the complete Navier-Stokes equations
easy and intuitive setup for the foaming case
freely definable PUR material properties by equations or curves
polyurethane (PUR) injection through one or more inlets
open or closed domains including moving of additional parts
moving of the mixing head

Whitepaper PUR Foaming

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.