Verification and validation of NASA LEWICE 2.2 icing software code

We present in this paper some results on the verification and validation of LEWICE 2.2 icing software code. The validation carried out a detailed analysis of ice accretion under a wide range of icing conditions. We performed a verification of the code options; analyzed and tested the LEWICE 2.2 code to ensure that no changes have been made to the previous validated ice shape simulation capability; and performed grid and time-step size sensitivity analysis, material properties and body dimensions sensitivity analysis, and validation of LEWICE 2.2 using thermal analysis. The validation tests have shown that the program is working properly. It is sending the right error messages; the output results are consistent, and the software is properly modeling the ice growth behavior. For the validation of LEWICE 2.2 using thermal analysis, the results show that the experimental data obtained with thermocouples do not compare well with the results of the numerical prediction. The error on the average temperature is too high (up to 60%) for all of the sections and for both the inside and outside surface.