"lengthwise direction" is correct and can be used in written English.
It is typically used to describe a line of action or the orientation of an object that goes the length of something else. For example: "Cut the squash into thin slices in the lengthwise direction before baking."
The cross grain direction has less shrinkage than a lengthwise direction.
The wheel makes to and fro travel of 600 mm in the lengthwise direction along the middle of the slab.
Sections can either be constant in the lengthwise direction, or may vary by braiding over a removable or permanent core having the desired shape.
Strain gauges are attached to the outer surface (backface) of the substrates in the lengthwise direction to measure local surface strain during crack propagation.
From Fig. 11a it was analyzed that with growing height of whip roller's position at constant depth, shrinkage of grey and finished fabric increased in lengthwise direction because relaxation of fabric was more.
The governing equations are derived in the context of the Lord and Shulman theory (L S theory), where the material properties of the thin plate are assumed to be graded along the lengthwise direction according to a power law distribution.
The effects of variation ratio of thickness in chordwise and lengthwise directions, twist, and curvature both in two directions aforementioned on vibrations of cylindrical panels are studied in detail, and typical vibration mode shapes are plotted to demonstrate the effects.
The BNC tubes of 40 mm in length were stretched in two directions, that is, lengthwise (axial direction) and breadthwise (radial direction).
Normally, the planks all point in the same direction lengthwise, but neighboring molecules twist randomly in all directions, as thermal energy keeps the individual molecules jiggling.
As a sample, 84 solar modules in each single row of, say, X direction (lengthwise) and a series of six rows of solar panels in another, say, Y direction (widthwise) are considered.
BNC tubes were stretched in two directions, lengthwise and breadthwise.
