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Walters, K. The Korean Society of Rheology 1999 Korea-Australia rheology journal Vol.11 No.4
The main events in the historical development of Rheology are traced and particular attention is paid to the leading players, the controversies, the priority disputes and the nomenclature disagreements. Some of the lessons to be learned from the past are then highlighted and a positive assessment is given of the prospects for rheological research in the next millennium
Walters, K.,Tamaddon-Jahromi, H.R.,Webster, M.F.,Tome, M.F.,McKee, S. The Korean Society of Rheology 2009 Korea-Australia rheology journal Vol.21 No.4
In various attempts to relate the behaviour of highly-elastic liquids in complex flows to their rheometrical behaviour, obvious candidates for study have been the variation of shear viscosity with shear rate, the two normal stress differences $N_1$ and $N_2$, especially $N_1$, and the extensional viscosity $\eta_E$. In this paper, we shall be mainly interested in 'constant-viscosity' Boger fluids, and, accordingly, we shall limit attention to $N_1$ and $\eta_E$. We shall concentrate on two important flows - axisymmetric contraction flow and "splashing" (particularly that which arises when a liquid drop falls onto the tree surface of the same liquid). Modern numerical techniques are employed to provide the theoretical predictions. It is shown that the two obvious manifestations of viscoelastic rheometrical behaviour can sometimes be opposing influences in determining flow characteristics. Specifically, in an axisymmetric contraction flow, high $\eta_E$ can retard the flow, whereas high $N_1$ can have the opposite effect. In the splashing experiment, high $\eta_E$ can certainly reduce the height of the so-called Worthington jet, thus confirming some early suggestions, but, again, other rheometrical influences can also have a role to play and the overall picture may not be as clear as it was once envisaged.
K. Walters,H.R. Tamaddon-Jahromi,M.F. Webster,M.F. Tomé,S. McKee 한국유변학회 2009 Korea-Australia rheology journal Vol.21 No.4
In various attempts to relate the behaviour of highly-elastic liquids in complex flows to their rheometrical behaviour, obvious candidates for study have been the variation of shear viscosity with shear rate, the two normal stress differences N1 and N2, especially N1, and the extensional viscosity ηE. In this paper, we shall be mainly interested in ‘constant-viscosity’ Boger fluids, and, accordingly, we shall limit attention to N1 and ηE. We shall concentrate on two important flows - axisymmetric contraction flow and “splashing” (particularly that which arises when a liquid drop falls onto the free surface of the same liquid). Modern numerical techniques are employed to provide the theoretical predictions. It is shown that the two obvious manifestations of viscoelastic rheometrical behaviour can sometimes be opposing influences in determining flow characteristics. Specifically, in an axisymmetric contraction flow, high ηE can retard the flow, whereas high N1 can have the opposite effect. In the splashing experiment, high ηE can certainly reduce the height of the so-called Worthington jet, thus confirming some early suggestions, but, again, other rheometrical influences can also have a role to play and the overall picture may not be as clear as it was once envisaged.
Restorationism and the Initial Evidence Doctrine
( Kenneth R. Walters Jr. ) 한세대학교 영산신학연구소 2012 영산신학저널 Vol.25 No.-
The relationship between restorationism and Pentecostalism has long been noted. What has not been observed is the close relationship between restorationism and the Pentecostal doctrine of Initial Physical Evidence. This paper examines that relationship, showing that it was the restorationist mindset that led Pentecostal pioneers to identify speaking in tongues as the initial evidence of the Baptism in the Holy Spirit in the early days of the movement in the United States. It begins by showing that the restorationist mindset so prevalent amongst proto-fundamentalists as well as leaders in the Holiness movement had already begun asking if tongues might not be restored as a part of the outpouring of the Spirit. The importance of the Azusa Street Revival in promulgating the doctrine is examined. Then the rapidity of the spread and acceptance of this teaching is shown, beginning with Charles Parham in Topeka, Kansas and extending to virtually every corner of the United States, as well as Europe, Africa, and Asia through missionaries and others affected by the Azusa Street Revival. Finally, the debate particularly within the Assemblies of God in the United States and the almost immediate renewal of commitment to the teaching is examined.