CFD Analysis and Validation of Automotive Windshield De-Fogging Simulation

Nowadays Climate component system plays a vital role in JD power rating of automotive vehicle. Apart from customer point of view, stringent homologation norms pose challenge in designing climate control system components. At extreme cold climate conditions either mist/ fog forms on the automobile windshield. This makes visibility issue on driver/Co driver side. To overcome this issue efficient demister system is required. Development of Demister system requires thorough knowledge on velocity spread over windscreen and thermal performance of heater (HVAC). This work is aimed for simulating windshield demisting patterns of a vehicle as described by ECC norms. New methodology was developed to simulate the actual behaviour of condensation and evaporation of mist on the windscreen. Transient demisting patterns were simulated with the CFD code and validated with experimental test results.