As we know that, the combustion phenomenon is complicated to understand. The present research is aimed to conduct a comprehensive scientific study of wood-volatile combustion phenomena for a specific vertical combustor design and analyze various findings to improve the vertical combustor performance. The present report is an effort in continuation to have insights on CFD of combustion Phenomena. The CFD simulation can predict the behaviour of the combustion, which is the air-fuel mixture properties and how the burnt air leaves the combustion. Thus, it can provide a clear view of the particular combustion design.