Abstract
Approximate solutions of the N-S equations can be obtained in many cases of practical interest, provided that suitable simplifications can be made. Simplifications stem from the evaluation of the order of magnitude of the different terms appearing in the N-S equations. To assess the order of magnitude of each term, it is useful to write the equations in dimensionless form so that the terms of similar magnitude can be identified and the dimensionless groups that determine the structure of the flow field can be determined.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Notes
- 1.
The solution of equation (5.75) has the following form:
$$\begin{aligned} f = \text{ constant } \cdot \left[ \cot \theta + \frac{\sin \theta }{r} \ln \left( \frac{1 + \cos \theta }{1 - \cos \theta } \right) \right] ~~~. \end{aligned}$$ - 2.
Tipically, \(\overline{h} / a \simeq 1 / 1000\).
- 3.
In a plane channel with infinite width, the equivalent diameter is equal to twice the distance between the walls
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
Copyright information
© 2024 The Author(s), under exclusive license to Springer Nature Switzerland AG
About this chapter
Cite this chapter
Soldati, A., Marchioli, C. (2024). Approximate Solutions for Low Reynolds Number Flows. In: Fluid Mechanics for Mechanical Engineers. Springer, Cham. https://doi.org/10.1007/978-3-031-53950-3_5
Download citation
DOI: https://doi.org/10.1007/978-3-031-53950-3_5
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-031-53952-7
Online ISBN: 978-3-031-53950-3
eBook Packages: EngineeringEngineering (R0)