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Publications (9)
Box counting fractal dimension has been investigated as 3D Fracture parameters. Geothermal rock fractured and 3D fracture models are characterized its 3D fracture characteristics i.e. aperture, density and intensity. The investigation 3D Fractal dimension as aperture parameter, we use the rock samples and 3D Fracture models that have nearly the sam...
An andesite rock sample was taken from potential geothermal area on Lili-Sepporaki, west Sulawesi. The sample is an impermeable cap rock with a high silica mineral at alteration zone around a manifestation. Its Three-dimensional rock structure was analyzed to see its deformation due to temperature change. Change of temperature from 24˚C to 100˚C, 1...
A Sample of clay cap rock on geothermal area in Candi Umbul-Telomoyo, Semarang has been digitized to the observe 3D fracture development due to the influence of uniaxial pressure. The 3D fractures were analysed using digital image processing and analysis method. The sample is an altered cases andesite breccia with diameter of 4.4 cm and height of 4...
The complexity of the connected pore structure of porous media samples has been analysed using meandering parameter and permeability. The meandering parameter and absolute permeability was calculated for four porous medium models, which have porosity of 15%. Porous medium samples are generated by depositing grains of varying radius (10, 15, 20, 25...
The air drag constant for different nose shapes of projectiles is determined with the help of a simple method combining a projectile launcher, video tracking technique and spreadsheet computer code for simulating the motion. A projectile launcher with low-cost components is developed to study air drag in projectile motion. The launcher is based on...
Urinary stones are commonly differentiated into four types; calcium, struvite, cystine, and uric acid. While two of them, cysteine and struvite, could not be distinguished easily, in fact, they need a different kind of treatments. Significantly, the purpose of this study was to classify of urinary stones based on edge detection using a semi-automat...
Calculation of permeability from 3D tomographic rock images was performed by combining renormalization group approaches (RGA) and lattice Boltzmann method (LBM). Images of sandstone rock samples (i.e., Fontainebleau, Berea, and Sumatera sandstones) with block size of 256³ voxels were used in this study. LBM was applied to calculate permeability of...
Physical properties (i.e.: electric and elastic properties) of porous media are very important and required in many fields, such as geotechnical engineering, petroleum engineering, geophysics, etc. In this study, calculation of electric and elastic properties is conducted by means of finite element method from digital rock images. Porous rock image...
Permeability plays an important role to determine the characteristics of how fluids flow through a porous medium which can be estimated using various methods. Darcy's law and the Kozeny-Carman equation are two of the most utilized methods in estimating permeability. In Darcy's law, permeability can be calculated by applying a pressure gradient betw...
