Numerical Investigations on the Thermohydraulic Performance of CrossWavy Channels with Multi-Periodic Boundary Conditions L. X. Du a , T. Ma a , M. Zeng a , Z. X. Guo b & Q. W. Wang a a Key Laboratory of Thermo-Fluid Science and Engineering, MOE, School of Energy and Power Engineering , Xi'an Jiaotong University , Xi'an , Shaanxi , P. R. China b Department of Mechanical and Aerospace Engineerin...