Visco-Thermal Behavior of Acoustic Wave in Microscopic Pores of Porous Sound-Absorbing Material
多孔質吸音材微視構造内部における音波の流体・熱的挙動の分析・可視化
- Delivery
- Available on this site
- Format
- Price
- Non-members (tax incl.):¥1,100 Members (tax incl.):¥880
- Publication code
- 20244245
- Paper/Info type
- Journal of Society of Automotive Engineers of Japan
Vol.78 No.4
- Pages
- 44-48(Total 5 p)
- Date of publication
- Apr 2024
- Publisher
- JSAE
- Language
- Japanese
Detailed Information
Category(J) | カーボンニュートラルに資する熱・流体技術 Translation |
---|---|
Category(E) | Thermofluid Technology Contributes to Carbon Neutrality |
Author(J) | 1) 山本 崇史 |
Author(E) | 1) Takashi Yamamoto |
Affiliation(J) | 1) 工学院大学 |
Abstract(J) | 均質化法によるマルチスケールシミュレーションを適用し,多孔質吸音材の微視構造内における音波の流体・熱的挙動を可視化した.また,粘性および熱伝導による散逸エネルギーの寄与度を示した.計算モデルは,走査電子顕微鏡やμX線CTによる多孔質吸音材の微視構造画像を用いて代表的な構造と寸法を抽出し構築した. Translation |
Abstract(E) | Multiscale simulation based on the homogenization method is applied to sound-absorbing porous materials, and visco-thermal behavior such as streamline of acoustic wave and thermal distribution in microscopic scale is visualized. Moreover, energy dissipated in micro structure due to the viscosity and thermal conduction is decomposed, and the viscosity of air is found to be a main factor for sound absorption. To construct a finite element model in microscopic scale, scanning electron microscope (SEM) and X-ray computer tomography (CT) are utilized, and characteristic geometry and its size are deduced. |