Flow and Shape of Ultrasonic Cleaners: Constructal Law

The Ultrasonic System Research Institute has developed a liquid circulation technology for ultrasonic cleaners that utilizes the "Constructal Law" related to flow and shape (control of nonlinear phenomena). This was developed with inspiration from observations of river flows, as shown in the attached photo. Regarding the use of ultrasound, we believe that through our experience in observing flow, we can intuitively grasp acoustic flow (a nonlinear phenomenon of ultrasound). Acoustic flow <General Concept> When finite amplitude waves propagate through a gas or liquid, acoustic flow occurs. Acoustic flow is a unidirectional steady flow of matter that arises either as a result of viscous losses from wave pulses in a free inhomogeneous field, or in the vicinity of obstacles (cleaning objects, fixtures, liquid circulation) within an acoustic field, or near vibrating bodies due to inertial losses. Using the above as a reference and hint, we organize the technology for measuring, analyzing, evaluating, and utilizing (controlling) "nonlinear phenomena" in ultrasonic propagation phenomena through the "Constructal Law," which improves flow, thereby consolidating it into ultrasonic technology.

The Ultrasonic System Research Institute has developed a technology that applies the control of ultrasound and fine bubbles within a water tank to stimulate the surfaces of various materials and components with megahertz acoustic flow. In particular, the homogenization of surface residual stress has led to many achievements. << Deaeration Fine Bubble (Microbubble) Generation Liquid Circulation Device >> 1) By narrowing the suction side of the pump, cavitation is generated. 2) Bubbles of dissolved gas are produced due to cavitation. The above describes the state of the deaeration liquid circulation device. ... 6) In a stable and controllable state of ultrasound, the original product: a megahertz ultrasonic oscillation control probe is used to control the oscillation of megahertz (1-20 MHz) ultrasound. The optimization method for cavitation and acoustic flow achieves effective dynamic control of ultrasound by controlling the original nonlinear resonance phenomenon of liquid circulation and megahertz ultrasound. By organizing previous consulting responses, sound pressure measurements, and analyses, we have confirmed various know-how (specific methods related to individual objects and devices) and developed usage methods. If you are interested, please contact us via email.

***<Thinking Approach>*** The Ultrasonic System Research Institute has developed a model of the state, including phenomena related to the nonlinearity of ultrasound, as a Monoïd model in abstract mathematics (category theory). Based on this idea, we have developed a specific method for ultrasonic control as a spectral series of knot theory. The control method adapted to ultrasonic phenomena realizes dynamic changes in cavitation and acoustic flow by feedback analysis of sound pressure measurement data using an autoregressive model. From previous cases and achievements, it has been developed as a classification technique for nonlinear phenomena (harmonics, low-frequency reduction). Through a logical model, we dynamically control effective states of ultrasonic propagation (utilization) by classifying them into four types as follows: 1: Cavitation-dominant type 2: Acoustic flow-dominant type 3: Mixed type 4: Variable type The above logical classification is dynamically controlled by categorizing it into three variable type categories as a realistic response method based on the results of previous measurement data (ultrasonic phenomena that change over time).

Technology for stably utilizing fine bubbles with a spherical size of 20μm or less—nano-level cleaning method that controls acoustic flow of ultrasound— 1-1. Basics of Ultrasound 1-2. Propagation Phenomena of Ultrasonic Vibration 1-3. Fine Bubbles (Microbubbles) *Properties of Microbubbles* 1) Bubbles of about 10μm rise slowly over approximately 3 hours to a height of 1m. 2) The generated bubbles exist independently without coalescing, resulting in excellent dispersion. 3) They have the property of slowly rising in water and adsorbing tiny debris to bring it to the surface. ... 13) The negative potential depends on the pH of the water. 14) Microbubbles have excellent scattering characteristics for ultrasound. 15) Microbubbles collapse as a resonance phenomenon when exposed to ultrasonic irradiation. These properties are expected to be further elucidated in the future, but currently contain many unknown aspects. Propagation Characteristics of Ultrasound 1) Detection of Vibration Modes (Changes in Self-Correlation) 2) Detection of Nonlinear Phenomena (Changes in Bicoherence) 3) Detection of Response Characteristics (Analysis of Impulse Response) 4) Detection of Interactions (Analysis of Power Contribution Rate)