The purpose of this type of modelling is to study and understand the behavior of fluids in a nozzle with an unsteady flow, which can help in predicting and optimizing the performance of various engineering systems such as pumps, turbines, and rocket engines.
The unsteady flow in a nozzle is affected by various factors such as the shape and size of the nozzle, the fluid properties, the inlet conditions, and the boundary conditions. These factors can significantly impact the flow patterns and the resulting performance of the nozzle.
In steady flow, the fluid parameters such as velocity, pressure, and density remain constant at any given point in time. In contrast, unsteady flow involves variations in these parameters with time, which can result in complex and dynamic flow patterns.
Some common methods used for modelling unsteady flow in a nozzle include computational fluid dynamics (CFD), finite element analysis (FEA), and experimental techniques such as laser Doppler anemometry (LDA) and particle image velocimetry (PIV).
The insights gained from these models can be applied in various industries, including aerospace, automotive, and energy, to improve the design and performance of nozzles and related systems. It can also be used for troubleshooting and predicting potential issues in existing systems.