Determination of porous media hydraulic properties using unsteady flow | |
| Author | Vachira Charanyanon |
| Call Number | AIT Thesis no. 735 |
| Subject(s) | Porous materials Hydraulics Hydraulic models |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering of the Asian Institute of Technology, Bangkok, Thailand |
| Publisher | Asian Institute of Technology |
| Abstract | The hydraulic properties of porous media are bubbling pressure, residual saturation, pore-size distribution index, hydraulic conductivity variation index and saturated hydraulic conductivity. There are many methods to determine these properties. One of which is commonly used is the steady flow method. This method is, however, laborous and time-consuming. In this study, an unsteady flow method, which is considered to be simpler and faster was developed. In this method, unsteady flow equations developed from a capillary tube model and numerical ยท solutions obtained from the differential equation for one dimensional drainage were used to find the theoretical time-cumulative outflow curves. The theoretical curves were then used to calibrate the hydraulic properties by comparing with experimental curves obtained from other investigations and in this study. Results indicated that the values of the properties obtained from the proposed method were sufficiently close to those obtained from the existing steady flow method except for the values of pore-size distribution index and hydraulic conductivity variation index. However, improvement could be made by more careful predetermination of the properties in the laboratory in order to select appropriate ranges and spacings of the values for the calibration. |
| Year | 1975 |
| Type | Thesis |
| School | Student Research Before 1980 |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Thesis (Year <=1979) |
| Chairperson(s) | Arbhabhirama Anat |
| Examination Committee(s) | Kinori, Ben-Zion ; Suphat Vongvisessomjai |
| Scholarship Donor(s) | Asian Institute of Technology |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 1975 |