This form comes with its own built-in design commentary, which is unusually explicit for a Shonen Jump technique: immediately after Tanjiro fires it, the manga's narration spells out exactly why — "of all the movements, the ninth form minimizes landing time and landing area... making it perfect for this rotating room. It keeps me ready to move in any direction, and is well suited for a fight with such uncertain footing." That's not flavor text; it's the story directly justifying the technique's tactical niche (minimal ground contact, omnidirectional readiness) rather than leaving the reader to infer it from the animation alone.
VIZ's choice to render 乱 as "Turbulent" rather than a more literal "Chaos" or "Disorder" is a smart register match: "turbulent" carries a specifically fluid-dynamics connotation in English (turbulent flow vs. laminar flow) that lines up precisely with 水流 (suiryuu, "water current") earlier in the same compound name — the whole VIZ title reads as a coherent hydrodynamics phrase ("Splashing Water Flow: Turbulent") in a way "Splashing Water Flow: Chaos" would not.
Only one clean named occurrence survives in the corpus (Vol. 3, p.176), with a second, closely-linked reference the very next page (p.177) that names the form number (玖ノ型) again while explaining its purpose rather than repeating the full technique name — a pattern seen elsewhere in this dictionary where a name-drop panel is immediately followed by an explanatory caption box rather than a second shout of the attack name.