NOVELTY - The method involves providing a surface (104) having a phase-changing material with a melting temperature and sublimation temperature lower than a temperature of a flowing substance such as droplet (108). The flowing substance is introduced onto the surface, for causing a portion of the phase-changing material to locally transition from one state to other state, for forming a lubricating intermediate layer (106) between the flowing substance and the surface.    USE - Method for facilitating flow of flowing substance such as liquid e.g. organic liquid, solid and water droplet on surface e.g. coating surface and microtextured surface on substrate e.g. liquid substrate and solid substrate e.g. pipeline (all claimed), used in various applications. Can also be used in facilitating flow of flowing substance such as hexane, heptane, ethyl acetate, pentane, ethanol, acetone, toluene, decane, nanofluids and biofluids e.g. plasma and blood on surface, used in pharmaceutical and drug related industries, microfluidic and bio-related application, continuous-flow microfluidics, digital microfluidic, DNA chips, molecular biology application, study of evolutionary biology study of microbial behavior, cellular biophysics, optofluidics, fuel cell application, etc.    ADVANTAGE - The drag and adhesion between the liquid or solid substance flowing over the solid or liquid surface can be diminished, by creating the vapor cushion through evaporation of the phase- changing material of or on the surface or encapsulated within textures of the surface. The contamination of the flowing substance by cutting off or preventing oxygen, dust particles, and other contaminants can be prevented from reaching the flowing substance. The oil that is forced into pipelines can be heated, for creating the vapor layer underneath, so that the drag on the flowing oil and the required pumping power can be reduced. The chemicals/liquids can be transported in sealed environments without contact with solid surface. The adhesion of natural gas hydrates in oil and gas pipelines can be reduced to reduce hydrate plug formation in deep sea applications. The flowing substance can be prevented from spreading on the sublimating solid phase changing material when the freezing point of the flowing liquid is higher than the sublimation temperature of the phase changing material.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the solid substrate covered by the surface.    Solid substrate (102)    Surface (104)    Lubricating intermediate layer (106)    Droplet (108)