Four types of undulated cylinders with streamwise undulation. transverse undulation. in-phase undulation and antiphase undulation are employed to investigate the undulation-axis effect on the structure of heat transfer around wavy cylinders. The flows around these undulated cylinders are numerically simulated by large eddy simulation at Re = 3000. https://www.lightemupsequences.com/flash-sale-Bachelorette-Party-Decorative-Picks-Pack-of-24-mega-choice