On a Wavenumber Optimized Streamline Upwinding Method for Solving Steady Incompressible Navier-Stokes Equations

Kao, Neo Shih-Chao; Sheu, Tony W. H.; Tsai, Shun-Feng

doi:10.1080/10407790.2014.949522

Cited by 4 publications

(1 citation statement)

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“…Based on the finite The objective of the present study is to analyze the source for the untrue simulation results and find an effective way to settle the problem. A modified algorithm, which is similar to the upwind method [12,13], is proposed to trace the filling front. This proposed method makes the advection of the filling state to be mainly affected by the filling flow behind the filling front.…”

Section: Introductionmentioning

confidence: 99%

Algorithm for Improvement of a Wrongly Adverted Filling Profile in Injection Flow

Shi

Barrière

Cheng

et al. 2016

Metals

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Abstract:As Eulerian description is generally used for the simulation of filling flow problems in the powder injection molding process, and the governing equation of the filling state takes the form of an advection equation, the distortion can be easily produced when dealing with the filling process in complex cavities, such as the similar channels in shapes of K and L, inside which the phenomena of opposite joining and bypass are involved. In order to improve the precision, causes of the unrealistic results were analyzed in the present paper. A notion similar to the upwind method was introduced and a corresponding correction method was proposed to settle this problem. Based on the efficient explicit algorithm for PIM simulation, and by means of systematic operation to modify the fluid velocity field, the untrue impact of air flow, represented by the velocity field in front of the filling fronts, can be weakened. Then, the advection of the filling state can be mainly affected by the flow field behind the filling front. The simulation results show that the correction algorithm can effectively inhibit the distortion. The simulation of the filling processes in the complex cavities, inside which the flow directions will be subject to the sudden changes, can be realized correctly.

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Section: Introductionmentioning

confidence: 99%