Continuous casting is a widely used manufacturing method for the production of various steels. The process involves physical phenomena including but not limited to heat transfer, fluid flow, solute distribution, solidification, microstructure formation. There have been several studies reported about modelling this process in literature. However there is no comprehensive opensource program base to simulate this process realistically. Such an open source program will help bring together collaborative efforts to bring the capabilities of the program code closer to the requirements of the practicing engineers and also allow for use as a physics based toolbox to simulate "what if" scenarios. This study is aimed at developing a program code for the complete process of continuous casting in a modular manner. OpenFOAM, an open source CFD code will be used for this as it is currently one of the most robust and open source platforms for simulating multi-physics processes. After achieving a maturity to represent adequate complexity of the processes and benchmarking with industrial data, it is envisaged that the program will be useful in generating data that is useful to create surrogate models that can help in the control of such processes in the industry. The present work envisages to include models on thermal, fluid flow and segregation analysis to understand the solidification process in the continuous casting process.