A new concept of guidable multi-layer free curve surface flow for liquid metal plasma facing components (PFCs), which is composed by three layer flows, is addressed and its establishment and magneto-hydrodynamics (MHD) behaviors are also investigated by theoretically and experimentally. The analysis result indicates that the third free surface flow namely MHD effect stability layer III flow can be established under a gradient magnetic field by adjusted layers I and II situations. In meantime, layers I and II flows can be as a heat sink and a coolant flow. The multi-layers flow concept is also suitable to a free flat surface flow. The primary experimental results show that a curve plate-multilayer meshes system, which was built based on the theoretical results, can be efficiently conducting the free curve surface flow to avoid a rivulet flow, and that the transverse gradient magnetic field made free curve surface flow more stability and surface more smooth. Moreover, the transverse magnetic field enhanced the secondary flow effect is observed.

plasma facing components, free curve surface flow, MHD effect, secondary flow.