The design of the bulk handling equipment should be done very effectively. Although the design of this equipment
might look simple, it can easily become costly in maintenance if it is not designed properly. A designer should consider
parameters like surface roughness and wall friction angle, etc for a better effective design. Considering these parameters in
design will not only improve the performance of equipment, but it will also reduce wear and tear of bulk solid handling
equipment. The objective of this study is to establish a regression curve between the surface roughness and wall friction angle
and to showcase the effect of surface roughness on the wall friction angle
