Industrial equipment products had been developed for a small and compact design. Cooling system is also developed to mini heat exchanger with microchannel as main component. The main study is to find the characteristic of flow pattern and heat transfer effect in microchannel. The experiment has been done with visual apparatus that placed after outlet of test section with inner diameter 0.5 mm. The working fluids used is a natural refrigerant (propane) that operated on a vary parameter of experiment condition i.e. saturation temperature, mass flux and heat flux. Mapping of flow pattern used Wang's Map. The result experiment reported intermittent flow pattern occurred along operated experiment. Heat transfer showed increasing value on initial occurred two phase. The observation to visual data has reported as additional of experiment analysis.

No abstract

No abstract

Computational fluid dynamics (CFD) in many cases requires designing 3D models manually, which is a tedious task that requires specific skills. In this paper, we present a novel method for performing CFD directly on scanned 3D point clouds. The proposed method builds an anisotropic volumetric tetrahedral mesh adapted around a point-sampled surface, without an explicit surface reconstruction step. The surface is represented by a new extended implicit moving least squares (EIMLS) scalar representation that extends the definition of the function to the entire computational domain, which makes it possible for use in immersed boundary flow simulations. The workflow we present allows us to compute flows around point-sampled geometries automatically. It also gives a better control of the precision around the surface with a limited number of computational nodes, which is a critical issue in CFD.

No abstract