Estimating the Richardson-Zaki index n for non-spherical irregular natural sediments in a concentrated suspension

المؤلفون المشاركون

Ismail, Norli
al-Rawi, Rim A.
Umar, A. K. Muhammad
Ahmad, Anis

المصدر

ZANCO Journal of Pure and Applied Sciences

الناشر

جامعة صلاح الدين قسم النشر العلمي

تاريخ النشر

2016-06-30

دولة النشر

العراق

عدد الصفحات

6

التخصصات الرئيسية

علوم الأرض و المياه و البيئة

الملخص الإنجليزي

The hindered settling velocity (uh) of the particles is considered as a part of the terminal (free) settling velocity (ut).

Richardson and Zaki investigated this relation and derived an equation known as R and Z formula ( n h t u = u ε ) for spherical particles.

Currently work is modified the R & Z index n to become suitable for nonspherical irregular natural sediments that settled in concentrated suspension known as palm oil mill effluent (POME).

Aspect ratio (AR) adopted as a shape factor to determine the particle diameter.

The n-indexes modified at different Reynolds number (Re) taking into consideration the wall effect (λ).

The obtained results shows that the index n for non- spherical irregular particles has close values of index n for the spherical particles in comparison to the previous published data.

نوع البيانات

أوراق مؤتمرات

رقم السجل

BIM-787281

• APA
• MLA
• AMA