Numerical simulations of fully developed turbulent liquid flows in micro tubes

Fully developed turbulent liquid flows in micro tubes at various Reynolds numbers and tube diameters are numerically simulated using the second-order scheme of the control volume method. A one-equation turbulent model is introduced and modified to consider the micro-size effect. Detailed velocity and turbulent kinetic energy distributions are obtained based on the present model. Comparisons between the present numerical results and the available experimental measurements in the open literature show excellent agreement, thus validating the present model for this class of flow problems.