sekoituskohta

Sekoituskohta is a Finnish term used in processing, chemistry and related fields to describe the point within a mixing system where two or more streams first come into contact and begin to form a homogeneous mixture. It can refer to a specific physical location inside a mixer, such as a feed junction, or to a characteristic moment in time when mixing effectively starts in the flow.

In process engineering, the sekoituskohta is important for design and control because it influences the uniformity of composition, temperature, and other properties throughout the material being processed. Its position relative to reactor geometry, flow rates, and mixing energy affects residence time distribution, gradients, and the efficiency of subsequent reactions or operations. Identifying and controlling the sekoituskohta helps ensure consistent product quality and can aid scale-up from laboratory to production.

Measurement and analysis of the sekoituskohta typically involve tracer experiments, dye visualization, spectroscopy or concentration mapping, and numerical modeling such as computational fluid dynamics. Key metrics related to the concept include the degree of mixing, mixing time, and the dispersion characteristics of the flow.

The term is used across industries, including chemical manufacturing, polymer processing, pharmaceuticals, food engineering, and environmental engineering. In English-language literature it is often described as a mixing point or mixing location, though Finnish usage may vary by field. See also mixing, dispersion, and residence time distribution.