Heat Flux Predictions in a Fully Developed Channel Flow by

The performance of three different models and a model is studied in a fully developed 1D channel ow. The results are compared with the existing DNS data. All models of today are based on a HRN model. There are two main disadvantages with model. One is that it is nume-rically unstable for grids with well resolved wall regions (low ff values near the wall). The second disadvantage is the uncertainty in specify-ing near the wall. In the present work, model based on HRN fifl model is developed which has numerically appealing boundary condition for near the wall. The model is implemented to predict the properties in a fully developed 1D channel ow. A new set of model constants were determined by tuning the results to match DNS data