Flux Jacobian matrix update frequency adjustment method, device, equipment and medium

The invention discloses a flux Jacobian matrix updating frequency adjustment method, device and equipment and a medium, and relates to the field of fluid calculation, and the method comprises the steps: determining a maximum residual error corresponding to a target discrete equation in a process of carrying out a preset number of time step iterations on a discrete equation set; the discrete equation set is obtained by discretizing the N-S equation set through an implicit time step iteration method; the target discrete equation is a first equation including a flux Jacobian matrix and a residual error in discrete equation sets; in the process of carrying out iterative solution on the discrete equation set in the current time step, determining a current residual corresponding to the target discrete equation; and determining a current updating frequency based on a comparison result between the current residual error and a preset residual error lower limit and/or a maximum residual error so as to determine whether