The advent of modern digital computers has enabled applied mathematicians engineers and scientists to make significant progress in the solution of previously intractable problems. Indeed it is now possible to assess the validity of previously unproven concepts related to complex problems. This trend is particularly valid in fluid mechanics where there is an increasing need to test previously advocated fundamental concepts and to develop new computer-based numerical techniques. Indeed it is now apparent that new concepts can be tested via numerical methods. The main objective of the Journal Numerical Methods in Fluids is to provide a timely and readily accessible reference for those engaged in computer aided design and research in computational fluid dynamics. The topics suitable for inclusion range from potential flow through viscous flow (incompressible and compressible) and even to those problems in which turbulence is the dominant feature. Methods for solving ancillary equations such as transport and diffusion are also quite relevant. The expressed intention of the Journal is the dissemination of information relating to the development refinement and application of computer-based numerical techniques for solving problems in fluids. These include but are not limited to the Finite Difference and Finite Element methods in each of which the manner of imposing boundary conditions to obtain a numerical solution can be quite important. The submission of manuscripts in which the primary contribution is experimental is encouraged if such results are compared with previously published numerical predictions. Also encouraged are papers in which an established numerical technique is used to study some of the subtleties associated with the physics of fluids. Indeed even papers presenting closed form solutions directly related to engineering problems and demonstrated to be effective will be published. Although it is not practicable to publish complete computer codes the salient features of a new code will be accepted as technical notes which should include examples illustrating the advantage of the techniques. It is envisaged that such codes should be made available at the discretion of the authors. Contributions relating to aids in teaching and design will be processed in a similar manner.