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Journal : MEKTEK

PEMODELAN NUMERIK ALIRAN FLUIDA PADA TIANG SILINDER DENGAN METODE BEDA HINGGA Anasiru, Triyanti; Setiyawan, Setiyawan
MEKTEK Vol 12, No 1 (2010)
Publisher : MEKTEK

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Abstract

Fluid flow in nature represent stream three dimension. For example, coordinate of Cartesian of streamrepresent variable of component instruct X, Y and Z. Equation of the Stream developed from ConservationLaws Of Mass and Punish Newton II, later recognized with equation of continuity and equation of motionmean of Navier Stokes.This Writing aim to to get model of numeric for case of simple fluid flow and the fluid flow which through ofpillar cylinder by using method different till. And also make analysis to result resolving of the problems.In test model program made to be conducted by using uniform stream for the ideal fluid by discrete 152 X 52Grid. This model tried to be made ideal fluid (unviscous, incompressible and unsteady). This model intendedto can see stability use of different model till in resolving of case of hydrodynamics and fluid dynamicsAnalyze performed within this writing for example every price early to model fluid case of uniform stream byusing program of Matlab 7.1 giving different result for the same case depend on initially condition. Fromresult analyze the way of handling of boundary condition very influence result of calculation. In general thecorrectness mount if order correctness of different operator till used mount
STUDI KOMPERATIF FUNGSI KERAPATAN OBSERVASI DENGAN FUNGSI KERAPATAN RAYLEIGH Anasiru, Triyanti; Setiyawan, Setiyawan
MEKTEK Vol 12, No 2 (2010)
Publisher : MEKTEK

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (244.545 KB)

Abstract

Observation data time series, used input to determine characteristic wave sea. Parameter wave is important for the infrastructure sea. Inveterate method used analyse parameter wave analyse domain frequency in ensemble average.This writing is research aim to learn step process data field till got parameter wave for infrastructure planning sea.Method this writing is plot of original data time series, plot time series which zero-mean and eliminated trend, making tables & draw histogram frequency change face irrigate, making tables & draw function density change face irrigate, f(η), comparing function density which got, with function of Gauss density, calculated deviasi (δ), or error, between function theoretical density with function density from data.To each data, conduct zero-upcrossing at data, to get high data wave. To each high data & perioda wave which got, making tables & draw histogram high frequency wave, making tables & draw function high density wave, calculating Hmax, H1/10, H1/3, Hrata2, Hmin and Tmax, T1/10, T1/3, Trata2, Tmin, HRMS, comparing function of density which got, with function of Rayleigh density, calculated deviasi (δ), or error, between function theoretical density with function density from data