One of methods of galvanizing strip production is continuous hot dip coating. In hot-dip coating process, a continuous steel strip is passing from bath of coating fluid (zinc), in result, one or both of the steel sides are wetted. The moving steel is located between a pair of plan air knife jets and consequently the excessive zinc returning to the bath by impinging air jets. Gas-jet wiping is a preferred method for controlling the final film thickness, because it avoids physical contact between the coating film and the air jets. The main parameters that control this process are the pressure distributions and shear stress distributions induced by the jet on the liquid surface. Others depend on the process parameters (such as standoff distance, nozzle slot opening, nozzle pressure and strip velocity) and on the liquid properties.The aim of this study is simulating the heat transfer in the jet wiping at galvanization process including the following steps: 1-Computational study of impingement heat transfer under a turbulent slot jet:Jet impingement is simulated via FLUENT. The compressible air flow, steady, two dimensional, ideal gas are options used to simulate impingement air jet. 2- Calculating thickness of coating molten zinc:A Finite Difference CFD code is developed to predict coating thickness. In this code, one dimensional, steady and laminar zinc fluid flow is solved. Distribution of shear stress and pressure of air jet along the strip are necessary for prediction coating thickness, also geometrical air jet details and molten zinc properties are needed. 3-Calculating temperature distribution in steel and zinc metal and the prediction of the onset of solidification of molten zinc:A Finite Volume CFD code is developed to solve energy equation. In this stage, the heat transfer coefficient, velocity distribution and coating thickness of molten zinc, strip velocity and molten zinc properties are necessary. It's important that the solidification process is simulated as well in order to find the place where the solidification is started and the length of solidification completion. In this stage, effect of parameters such as strip thickness, velocity distribution and coating thickness distribution, the heat transfer coefficient etc are investigated. The nucleation and growth of zinc grains during the solidification process depending on the rate of the heat transfer loss. The solidification process is a critical step in the hot-dip galvanization processes because of the heat transfer rate affects the size of grains. Key Words: heat transfer, Jet wiping, Solidification, Galvanization