槽道湍流內(nèi)氣泡瞬態(tài)受力數(shù)值研究
發(fā)布時間：2018-11-25 09:32
【摘要】：為了深入理解氣泡在湍流場內(nèi)的運動機制,使用歐拉-拉格朗日單向耦合數(shù)值方法,詳細分析了氣泡在低雷諾數(shù)槽道湍流場內(nèi)的瞬態(tài)受力情況;其中液相湍流速度場采用直接數(shù)值模擬方法求解,氣泡的瞬態(tài)受力由牛頓運動方程計算;計算時,考慮了相間阻力、剪切升力、壓力梯度力、虛擬質(zhì)量力、重力對氣泡運動的影響。目前的計算結(jié)果表明:氣泡所受的瞬態(tài)作用力分量同時取決于重力作用方向、液相流向以及氣泡所處的法向位置;不同方向上、不同位置處影響氣泡運動的主要作用力分量是不同的;相比較而言,與重力方向垂直的剪切升力分量在近壁面區(qū)域為影響氣泡運動的主要作用力,壓力梯度力的法向分量在近壁面區(qū)域之外為影響氣泡運動的主要作用力,相間阻力分量在整個槽道區(qū)域內(nèi)均為影響氣泡運動的主要作用力,除了豎直槽道近壁面處之外、虛擬質(zhì)量力也均為影響氣泡運動的主要作用力。
[Abstract]:In order to understand the motion mechanism of bubble in turbulent field, the transient force of bubble in low Reynolds number channel is analyzed in detail by using Euler-Lagrangian unidirectional coupling numerical method. The velocity field of liquid phase turbulence is solved by direct numerical simulation, and the transient force of bubble is calculated by Newtonian equation of motion. The effects of interphase resistance shear lift pressure gradient force virtual mass force and gravity on bubble motion are considered. The current calculation results show that the transient force component of the bubble depends on the direction of gravity, the flow direction of the liquid phase and the normal position of the bubble at the same time. In different directions and at different positions, the main force components affecting bubble motion are different. In contrast, the shear lift component perpendicular to the gravity direction is the main force affecting the bubble motion in the near wall region, and the normal component of the pressure gradient force is the main force that affects the bubble motion outside the near wall region. The interphase drag component is the main force that affects the bubble motion in the whole channel region, except for the vertical channel near the wall, the virtual mass force is also the main force that affects the bubble motion.
【作者單位】： 常州大學(xué)機械工程學(xué)院;
【基金】：國家自然科學(xué)基金(51376026) 江蘇省大學(xué)生創(chuàng)新創(chuàng)業(yè)訓(xùn)練計劃重點項目(201510292016Z)
【分類號】：O357.5
本文編號：2355626
[Abstract]:In order to understand the motion mechanism of bubble in turbulent field, the transient force of bubble in low Reynolds number channel is analyzed in detail by using Euler-Lagrangian unidirectional coupling numerical method. The velocity field of liquid phase turbulence is solved by direct numerical simulation, and the transient force of bubble is calculated by Newtonian equation of motion. The effects of interphase resistance shear lift pressure gradient force virtual mass force and gravity on bubble motion are considered. The current calculation results show that the transient force component of the bubble depends on the direction of gravity, the flow direction of the liquid phase and the normal position of the bubble at the same time. In different directions and at different positions, the main force components affecting bubble motion are different. In contrast, the shear lift component perpendicular to the gravity direction is the main force affecting the bubble motion in the near wall region, and the normal component of the pressure gradient force is the main force that affects the bubble motion outside the near wall region. The interphase drag component is the main force that affects the bubble motion in the whole channel region, except for the vertical channel near the wall, the virtual mass force is also the main force that affects the bubble motion.
【作者單位】： 常州大學(xué)機械工程學(xué)院;
【基金】：國家自然科學(xué)基金(51376026) 江蘇省大學(xué)生創(chuàng)新創(chuàng)業(yè)訓(xùn)練計劃重點項目(201510292016Z)
【分類號】：O357.5
【相似文獻】
相關(guān)期刊論文 前3條
1 代曉巍;金良安;遲衛(wèi);彥飛;田恒斗;;水中上升氣泡體積變化率的圖像分析技術(shù)[J];實驗流體力學(xué);2010年06期
2 張凌新;聞仲卿;邵雪明;;多泡相互作用對氣泡潰滅的影響[J];力學(xué)學(xué)報;2013年06期
3 ;[J];;年期
相關(guān)會議論文 前1條
1 何術(shù)龍;邢圣德;程紅霞;倪其軍;;兩維人工氣泡的數(shù)值模擬研究[A];第九屆全國水動力學(xué)學(xué)術(shù)會議暨第二十二屆全國水動力學(xué)研討會論文集[C];2009年
相關(guān)博士學(xué)位論文 前1條
1 孫濤;加熱表面上氣泡傳熱及動力學(xué)特性的LBM模擬[D];大連理工大學(xué);2013年
，本文編號：2355626
本文鏈接：http://sikaile.net/kejilunwen/lxlw/2355626.html
最近更新
教材專著
