solver_nb.lid_heateqn_solver

solver_nb.lid_heateqn_solver(x, args)

NumbaMinpack version of the lid heat equation solver. Solves physics.Numba.heateqn.

Called in lid_functions.lid_development.

Parameters:

• x (array_like, float, dimension(vert_grid)) – Initial guess at the lid column temperature. [K]

• args (array_like) – Array of arguments to pass into the function. See args_array for details.

Returns:

• root (array_like, float, dimension(core.iceshelf_class.IceShelf.vert_grid_lid)) – Vector containing the calculated lid column temperature, either after successful completion or at the end of the final iteration for an unsuccessful solution. [K]

• fvec (array_like, float, dimension(core.iceshelf_class.IceShelf.vert_grid_lid)) – Vector containing the function evaluated at root, i.e. the raw output.

• success (bool) – Boolean flag determining whether the solution converged, or whether there was an error.

• info (int) – Integer flag containing information on the status of the solution. From the Minpack hybrd documentation: !! * *info = 0* improper input parameters. !! * *info = 1* relative error between two consecutive iterates !! is at most xtol. !! * *info = 2* number of calls to fcn has reached or exceeded !! maxfev. !! * *info = 3* xtol is too small. no further improvement in !! the approximate solution x is possible. !! * *info = 4* iteration is not making good progress, as !! measured by the improvement from the last !! five jacobian evaluations. !! * *info = 5* iteration is not making good progress, as !! measured by the improvement from the last !! ten iterations.