HEAT AND MASS-TRANSFER SIMULATION BY MODE LING AT LOW REYNOLDS-NUMBERS IN A FLOW WITH LOCAL BLOWING

Heat and mass transfer simulation by modelling at low Reynolds numbers in a flow with local blowing. The turbulence model developed by Lam a nd Bremhorst with low values of Reynolds numbers is used to simulate a Row between two impermeable plate walls. This model, corrected by Yap , is able to simulate flow inside the boundary layer on the part of po rous walls submitted to the blowing. This model of flow inside a chann el with local blowing is coupled with a model of transfers through the impermeable walls and the porous wall, and with the environment. The global model is validated by comparison between experimental results f rom the literature and those obtained by the authors from experiences carried out with the test facilities of a subsonic thermal wind tunnel . A simulation of non-isothermal flow inside a channel with local blow ing shows the attractive way of wall cooling by blowing. The optimal i njection ratio is found equal to 0.01. (C) Elsevier, Paris.