The phrase "as a simple model" is correct and usable in written English.
It can be used when introducing a basic representation or framework for understanding a concept or phenomenon.
Example: "As a simple model, we can consider the relationship between supply and demand to explain price fluctuations in the market."
Alternatives: "as a basic representation" or "as a straightforward example".
The geometry considered here can be regarded as a simple model for finned heat exchangers.
Herein, a thin, elastic cylindrical shell is adopted as a simple model of the fuselage.
We use the Drosophila midgut, a stem-cell based organ analogous to the vertebrate small intestine, as a simple model to uncover the rules that govern adaptive remodeling.
As a simple model to explain this phenomenon, consider an arbitrary object made up of an ensemble of particles continuously moving about their mean position within the object.
Second, a thick circular plate with a solid shaft is chosen as a simple model of gear blanks.
And it's not because the fly is one of the most important laboratory animals in the history of biology, often used as a simple model for human genetics or neuroscience.
This setting serves among other things as a simple model for principal component analysis: Given a set of data points in Euclidean space, find out whether there exists a distinguished direction (a "spike") along which these data points align.
Researchers use X-ray laser at SLAC to track light-triggered chemical reactions in a molecule that serves as a simple model for the conversion of solar energy into fuel.
The artificial unit described here as a simple model, provides an important biomimetic step down a path aligned with the low-cost artificial photosynthetic systems manufacturing.
The equivalent linearization procedure has established that a mass-dashpot system can be used as a simple model for considering seismic isolation of buildings on sliding pads.
The initial boundary value problem can be regarded as a simple model describing oscillations of flexible structures like suspension bridges or iced overhead transmission lines.
