岡山大学環境理工学部 Acta Medica Okayama 1341-9099 13 1 2008 State of the Art on Filter Design and Particle Clogging; and Proposed New Numerical Approach to Redesign 63 66 EN Makoto Nishigaki Mitsuru Komatsu Koji Kumamaru Filters are essential in the design of embankments/dams, drains and wells for water and oil supplies. As a result of these functions, filter use is increasing. In order to use the required filter, various empirical relations have been given based on mathematical and field experience. However, these guidelines have not worked to perfection considering the fact that clogging within the filter face is a serious challenge. A short review on filter design criteria is given in this script coupled with a numerical formulation to propose the design limits. No potential conflict of interest relevant to this article was reported.