Tokyo Institute of Technology · 공학
Anindityo Patmonoaji 교수의 연구실은 다공성 매질 내에서의 물질 이동, 특히 가스의 용해 및 침전, 불활성 유체의 이동 메커니즘을 초미세 구조 수준에서 해석하는 데 초점을 맞추고 있습니다. 주로 X-선 마이크로컴puted 톰그래피와 미세모델을 활용해 용해 편향, 표면장력, 확산 및 대류의 상호작용을 정량적으로 분석하며, 이는 지하 이산화탄소 저장, 지하수 오염 복구, 건조 공정 최적화 등에 응용됩니다. 특히 CO₂의 특수한 용해 거동과 이로 인한 표면 막 형성 메커니즘은 연구의 핵심 과제입니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
Abstract Dissolution mass transfer from the trapped phase to the flowing phase in porous media occurs in various hydrogeology processes. One of the important phenomena is dissolution fingering and its effect on dissolution mass transfer. In this work, dissolution mass transfer in porous media with various particle sizes and distribution was investigated in pore scale and meso‐scale by using X‐ray microcomputed tomography. The specific interfacial area and mass transfer coefficient were measured
Micromodels are important for studying various pore-scale phenomena in hydrogeology. However, the fabrication of a custom micromodel involves complicated steps with cost-prohibitive equipment. The direct fabrication of micromodels with a 3D printer can accelerate the fabrication steps and reduce the cost. A stereolithography (SLA) 3D printer is one of the best options because it has sufficient printing performance for micromodel fabrication and is relatively inexpensive. However, it is not witho
When viscosity and density contrast exist in the vertical miscible displacement in porous media between two fluids, the interplay between the viscous force and gravity determines the interface stability. Two stability criteria are derived to determine the interface stability. Hill's and Dumore's stability criteria are used to determine the interface stability of the sharp and diffused interface, respectively. In this study, we visualized the crossover between unstable displacement and stable dis
多孔質内にトラップされているガスの流動している水相への溶解は二酸化炭素地下貯留（GCS）などの様々な水理学的分野において重要な過程である。GCS では，CO2 の溶解により，貯留層圧力変化や浮力によるリークリスクの低減につながるため溶解速度は安全性評価において重要な観点になる。本研究ではCO2, O2, N2, と Ar の４種のガスの多孔質中での溶解プロセスの違いを比較検討した。CO2 は他のガスに比べて極めて特徴的な溶解挙動を示すことを見出した。CO2 は他のガスに比べて溶解度が一桁程度大きいため，初期の溶解が非常に速く，トラップされたCO2 気 泡の周りに飽和水の膜が形成される。この飽和膜の存在がCO2 の物質輸送係数を低下させていると考えられる。
Abstract Using a combination of a porous plate, micro-computed tomography, and differential imaging, the differential imaging porous plate (DIPP) method was employed to monitor spatial fluid distribution and measure capillary pressure between oil and water in an oolitic limestone, Ketton. Based on geological interpretation, mercury intrusion capillary pressure (MICP), and scanning electron microscopy (SEM), the pores were classified into macropores, intermediate-size pores, and micropores. Macro
Understanding salt precipitation during brine evaporation in porous media is crucial for applications such as CO₂ storage, soil remediation, and industrial drying. While previous studies have primarily focused on displacement and evaporation, our research specifically investigates the evaporation process by employing a trapped brine condition to examine the interplay between evaporation, advection, and diffusion during brine drying in homogeneous porous media. Using X-ray microtomography, we vis
