02459nam a2200385 4500 20260818114113.0 241197 th eng .b10286433 AIT Thesis no. 212 Haider, Syed Jawad Flow of granular materials through orifices Bangkok : Asian Institute of Technology, 1968 72 p. Thesis ; no. 212 A thesis submitted in partial fulfilment of the requirements for the degree of Master of Engineering in the Asian Institute of Technology, Bangkok, Thailand. Thesis (M.Eng.) - Asian Institute of Technology, 1968 Using dry sand, the factors affecting the flow of granular materials through circular orifices were studied under gravity conditions. Tests were conducted on four uniformly-graded fractions of Bangkok river sand. Showering techniques were employed to pack the granular mass at different porosities. It was observed that the height of fill did not affect the rate of flow which varied approximately as the cube of the orifice diameter. The flow rate was appreciably affected by the effective particle size and the porosity of the granular mass. The critical orifice diameter, at which flow ceased completely, was obtained for each sand grading and the effect of porosity on this diameter was determined. Also, the flow pattern was observed in a perspex cylinder and it was concluded that sand flows out via a conical channel formed directly above the orifice. Bulk solids flow Sand Mackey, Robert D., Chairperson Chai Muktabhant, Examination Committee Moh, Za-Chieh, Examination Committee Asian Institute of Technology. Thesis ; no. 212 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B24581 .b10286433 mnait v 260625 3 951012 m a v 0 mnait mnarc 20 40 Barcode : 30050003093225 CREATED : 1994-05-17 RECORD # : i10354281 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050160113956 CREATED : 2016-07-04 RECORD # : i12929360 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 45778 45778 0 0 0 0 MAIN MAIN mnait 2026-08-18 0 AIT Thesis no. 212 30050003093225 2026-08-18 11:41:13 1 2026-08-18 20 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no. 212 30050160113956 2026-08-18 11:41:13 2026-08-18 40