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Modeling thermal conductivity of carbonate rocks using image data, Subis limestone, Malaysia

Show simple item record Y. Ibrahim E. Padmanabhan W. Ismail A. Taha M. Shoieb 2017-06-18T09:45:38Z 2017-06-18T09:45:38Z 2017-06-18
dc.description.abstract The Thermal conductivity (TC) was modeled for carbonate rocks using a digital rock volume constructed from image data by the stacking of multiple 2D computer tomography images. The main problem with the existing models lies in that these models consider only the volume fraction of pores and don’t consider the geometry of such pores. The proposed model applies finite element theory where a representative volume was taken for simulation. The model evaluated the impact of porosity on TC by comparing TC of two samples with contrasting pore network systems: connected pores, versus isolated pore network system, under both dry and saturated conditions. When modeling dry conditions by using TC of air for pore volume, the results showed extremely high matching with experimental results. Samples of relatively high porosity showed a TC value much higher compared to that computed using a mixing-law model. This is because the model considers the internal structure and not only the volume fraction of pore volume. TC simulated for saturated samples did not show that expected increase in TC value that is normally calculated when replacing the small value of air TC with that of water which is relatively high. The result obtained for saturated conductivity needs to be experimentally validated under dynamic flow to confirm dynamic modeling. In summary, the model shows that thermal conductivity is not always reduced following volume fraction of pores as computed by different mathematical models. en_US
dc.language.iso en en_US
dc.subject الاوراق العلمية en_US
dc.subject اوراق علمية en_US
dc.subject thermal conductivity en_US
dc.subject porosity en_US
dc.subject modeling en_US
dc.subject carbonate rocks en_US
dc.title Modeling thermal conductivity of carbonate rocks using image data, Subis limestone, Malaysia en_US
dc.type Article en_US

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