• T Vijaya Kumar
• Darmendra tewari

Flooding of Indian rivers is a very serious problem, since this greatly affects the normal life of people and the social & financial condition of that place. This problem has been identified by many Researchers in the past like Tominaga and Nezu, Ackers and V.T Chow etc. A good amount of research work has been devoted to find out desirable solution of flooding problem. While flooding, river flows with very high discharge and may overflows over its banks and the excess water reaches to its flood plains. This excess water leads to formation of compound channel. The nature of flow during flooding is generally turbulent in nature. It has been found that the velocity of flow in flood plain is less than that of the velocity of flow in main regular channel. It is a well-known fact that this change in velocity between main channel and flood plain leads to formation of a shear layer. These shear layers produce resistance to flow, which leads to uncertainty in forecasting of flow and increases resistance on channel. Geometric similar model can be utilized to find out necessary information. Generally, one dimensional empirical model can be used to forecasting of flow taking the assumption that flow is uniform in compound channel. However, Compound Open channel has partially uniform flow due to momentum transfer in sub sections and unexpected change in depth of flow. Hence the analysis of turbulent flow is necessary in this situation. In Past, researchers have used various models to analyze turbulent flow in compound open channels, basically for low development length. Hence, in this study an effort is made to analyze the turbulent flow by Large Eddy Simulation method (LES) to forecast the flow and its resistance on channel. The LES is carried out by taking sufficient development length so that uniform turbulent flow can be developed. The development length is incorporated in the computational domain. It is fact that experimental flow analysis of compound open channels with various hydraulic conditions is very expensive and difficult. Hence, this analysis of flow is done, by using software approaches such as used in Ansys Software.

Large eddy simulation, Turbulent structure ,Composite friction factor, compound channel, ANSYS.

"FLOOD ANALYSIS IN COMPOUND CHANNEL –COMPARISON OF COMPUTATIONAL AND EXPERIMENTAL RESULTS", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 2, page no.261-269, February-2019, Available :http://www.jetir.org/papers/JETIR1902838.pdf

"FLOOD ANALYSIS IN COMPOUND CHANNEL –COMPARISON OF COMPUTATIONAL AND EXPERIMENTAL RESULTS", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 2, page no. pp261-269, February-2019, Available at : http://www.jetir.org/papers/JETIR1902838.pdf