Flow field prediction method and system

The invention provides a flow field prediction method and system, and relates to the technical field of fluid mechanics, and the method comprises the steps: obtaining corresponding flow field data of a research object under different geometric shapes and working conditions, and constructing a flow field data set; converting the flow field data in the flow field data set into a storage structure based on a grid topology connection diagram; establishing a flow field prediction model based on a graph convolutional neural network, and training the flow field prediction model by using the converted flow field data set; and inputting geometric parameters and working condition parameters to be predicted, and performing flow field prediction by using the flow field prediction model. According to the method, the information of the grid topology connection and the characteristics of variable geometry and variable working conditions are combined, and the flow field can be quickly predicted under the variable geometry an