Browse Publications Technical Papers 2001-01-1720
2001-05-14

Comparison of CFD Simulation Methods and Thermal Imaging with Windscreen Defrost Pattern 2001-01-1720

The measured windscreen defrost pattern for a saloon car has been compared with two CFD simulation methods and with the results obtained using a thermal imaging camera.
The objectives were to determine:
  • if CFD could be used with confidence to simulate defrost performance;
  • the difference between the two CFD methods;
  • the ability of the thermal imaging technique to predict defrost performance;
  • the most appropriate use of these techniques during an HVAC development programme.
There was a good comparison between the defrost pattern on the windscreen and the results from the thermal imaging camera and the two CFD methods. The CFD methods have been shown to be suitable for fault finding and recommending their use is reinforced for development work of ducts and vents in the HVAC system. Airflow direction and distribution could be implied from the thermal camera images, which makes it a suitable tool for fine tuning duct and vent designs at the final stages of the design programme.

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