1. Method of obtaining highly resolved flow field data representing the flow characteristics of fluid in a fluid system under analysis, comprising a first step of measuring and/or estimating parameters of the fluid system under analysis to produce a set of flow predictor parameters for the fluid system under analysis, the method comprising the further steps of, using a reference database containing highly resolved flow field data representing fluid flow simulation results of a reference set of fluid systems and flow predictor parameters of each of said set of reference fluid systems, performing a mathematical interpolation operation on said reference database to determine an interpolated set of flow predictor parameters, matching, to within predetermined error margins, the said set of flow predictor parameters of the fluid system under analysis, and determining, from said reference database, a set of highly resolved flow field data corresponding to the said interpolated set of flow predictor parameters.