الفهرس 
Introduction and Literature ReviewOnly 14 pages are availabe for public view
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Abstract
Result shows that the age and sex of the animal play an important role in the rate of infestation. It was observed that buffaloes aged more than five years were the most liable ones for mange mite infestation, followed by those aged from one to five years while those below one year show no infestation cases movements are considered; co-current and counter-current flows.The present investigation also considers the effect of a swarm of bubbles on the continuous phase velocity distribution in a two-phase flow vertical column.
The literature review revealed that the majority of published data is concerned with continuous phase Reynolds numbers higher than 4000.therefore, the present experimental apparatus is constructed in order to facilitate the study of bubbles movement in a continuous phase having Reynolds numbers lower than those previously reported.
A laser technique incorporating phase/Doppler particle analyzer (p/DPA) was employed for determining the size of small bubble and its rising velocity.simultaneously.for large bubble size, aphotographing technique was used to obtain the bubble properties.