Computational Fluid Dynamic (CFD) is part of a broader range of software tools which is encompassed by Computer Aided Engineering (CAE) tools.
Problem Solving with CFD
Computational Fluid Dynamic (CFD) is part of a broader range of software tools which is encompassed by Computer Aided Engineering (CAE) tools. Whether that is to evaluate and optimise a new design, find faults or troubleshoot an existing design, CFD aims to better understand and reduce the number of costly design iterations and instead, optimise flow and heat transfer problems.
We worked with, Addfield world leaders in incinerators that builds cremation and incineration units for incinerating animal carcasses or hospital waste. These biohazard waste materials must undergo a heat treatment of 850-950 degrees Celsius for a matter of a few seconds to ensure no contaminants are released into the atmosphere. The heat and flow distribution within the combustion chamber are critical in ensuring waste is entirely burnt and incinerated.
A model of our customer’s medical incinerator was generated and used for modelling both heat transfer and air flow within the whole incinerator.
The objective of this model was to demonstrate both uniform heat and flow distribution around the hearth where the waste is laid. Another aspect of the simulation was to study the airflow movement and potential vortex formation where ash could be collecting and potentially cause a blockage in the long run.
Insulation materials were also modelled with their correct thermal properties which allowed us to evaluate the external surface temperature and potential hot spot.
The result of the model revealed a number of vortexes where ash may gather, however it wasn’t a concern for this batch incinerator as some access was provided for cleaning and maintenance. The temperature of the hearth was evenly distributed which showed that the biohazard waste would burn and be incinerated evenly.
The time under the required temperature was adequate, confirming the requirement of the after burner chamber. Both steel work and insulating materials were modelled with their thermal properties and heat distribution and heat losses were evaluated through the casing. No hot spots were shown.