Offshore drilling is commonly performed with a top-tensioned drilling riser system. Operational uptime of the system is estimated through a global riser analysis, with input of hydrodynamic coefficients assumed by treating riser joints as circular cylinders. This is not accurate because the system consists mainly of buoyant riser joints with complex cross-sections. Buoyant joints have a generally circular shape but also have MUX recesses and stacking flats forming its outer profile. These surface features change its flow behaviour and hydrodynamic performance.
cDynamics is a small consultancy company with with employees. We work with specialized projects within general numerical analysis, CFD and FEA, mostly directed towards marine, offshore and aquaculture industry.