Helicoidal shells can be designed as right, inclined, open and wrong-unfolding.
M J Rynkovskaya 2009, 'Application and analysis of right helicoidal shells', RUDN Journal of Engineering Researcheshttp://journals.rudn.ru/engineering-researches/article/view/5005. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
A code has been developed which incorporates the real pitch of the helicoidal vortex wake.
Ali Helali, Badreddine Kamoun, David Afungchui, Mohamed Jomaa Safi 2012, 'The Circulation Distribution on the Lifting Line for a Given Extracted Power', International Journal of Rotating Machineryhttp://dx.doi.org/10.1155/2012/476908. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The cones are composed of helicoidal, bilaterally symmetrical and deeply incised scales with paired seeds.
Isabel M. Van Waveren 2019, 'A morphometric analysis of Tobleria bicuspis, a Voltziales seed cone from the earlyPermian Jambi palaeoflora, Sumatra (Indonesia)', PhytoKeyshttps://phytokeys.pensoft.net/article/29555/download/pdf/. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Diagnosis was confirmed with the aid of two-dimensional echocardiography and helicoidal angiotomography.
Almeida Rui Manuel Sequeira de, Lima Jr José Dantas, Kahrbek Thomas, Tanomaru Maurício 2001, 'Surgical repair of a pseudoaneurysm of the ascending aorta after aortic valve replacement',Arquivos Brasileiros de Cardiologiahttp://www.scielo.br/scielo.php?script=sci_arttext&pid=S0066-782X2001000400007. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Moreover, it results in stronger helicoidal cells in the downstream channel, along with zones of upwelling flow.
Laurent Schindfessel, Stéphan Creëlle, Tom De Mulder 2015, 'Flow Patterns in an Open Channel Confluence with Increasingly Dominant Tributary Inflow',Waterhttp://www.mdpi.com/2073-4441/7/9/4724. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The dynamical evolution consists of a helicoidal sequence of quasi-circular orbits, induced by the radiation-reaction and the background spacetime.
Rodríguez J.F., Rueda J.A., Ruffini R. 2018, 'Strong-field gravitational-wave emission in Schwarzschild and Kerr geometries: somegeneral considerations', EPJ Web of Conferenceshttps://doi.org/10.1051/epjconf/201816802006. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The peak of publication on analytical methods of linear analysis of helicoidal shells was in the 1950s.
Владимир Жан Поль 2017, 'ON THE INVESTIGATIONS OF RULED HELICAL SHELLS', Structural Mechanics of Engineering Constructions and Buildingshttp://journals.rudn.ru/structural-mechanics/article/view/15312. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The paper discusses the problems of the analysis of the stress-strain state of oblique helicoidal shells.
E M Tupikova 2015, 'ANALYSIS OF THE THIN ELASTIC SHELLS IN THE FORM OF LONG OBLIQUE HELICOID', Structural Mechanics of Engineering Constructions and Buildingshttp://journals.rudn.ru/structural-mechanics/article/view/11054. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)