Editors Overview

rtfm maintains an Editorial Board of practicing researchers from around the world, to ensure manuscripts are handled by editors who are experts in the field of study.

Open Access
Special Issue

An Introduction to Newtonian and Non-Newtonian fluid

Abstract Submission Deadline : November 30, 2023

Manuscript Submission Deadline : December 25, 2023

Special Issue Description

A Newtonian fluid is one in which the local strain rate, or the rate of change of its deformation over time, is linearly connected to the viscous stresses resulting from its flow at every place. The rate at which the fluid’s velocity vector changes determines how much stress is there. Only when the tensors describing the viscous stress and strain rate are coupled by a constant viscosity tensor that is independent of the stress state and flow velocity can a fluid be said to be Newtonian. The viscosity tensor is reduced to two real coefficients, which describe the fluid’s resistance to continuous shear deformation and continuous compression or expansion, respectively, if the fluid is also isotropic (mechanical properties are the same in any direction). A fluid that deviates from Newton’s law of viscosity—constant viscosity regardless of stress—is said to be non-Newtonian. When subjected to force, the viscosity of non-Newtonian fluids can change, becoming either more liquid or more solid. For instance, ketchup is a non-Newtonian fluid because shaking causes it to become runnier. Most frequently, the viscosity of non-Newtonian fluids depends on the shear rate or shear rate history (the progressive deformation caused by shear or tensile stresses). Nevertheless, some non-Newtonian fluids with shear-independent viscosities continue to display typical stress-difference patterns or other non-Newtonian behaviors. In a Newtonian fluid, the coefficient of viscosity serves as the proportionality constant, and the relationship between the shear stress and shear rate is linear, passing through the origin.


Newtonian fluid, Non-Newtonian fluid, Viscous stress, Strain rate, Coefficient of viscosity

Manuscript Submission information

Manuscripts should be submitted online via the manuscript Engine. Once you register on APID, click here to go to the submission form. Manuscripts can be submitted until the deadline.
All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the email address:[email protected] for announcement on this website.
Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a Double-blind peer-review process. A guide for authors and other relevant information for the submission of manuscripts is available on the Instructions for Authors page.

Participating journals:






950 $