本文選題：拉格朗日法 + 壁面摩擦速度��； 參考：《工程力學(xué)》2017年10期

【摘要】：采用拉格朗日方法模擬了風(fēng)致積雪漂移現(xiàn)象,在數(shù)值模擬中考慮了顆粒運(yùn)動(dòng)后質(zhì)量濃度對(duì)雪層表面摩擦速度的修正。以立方體周?chē)e雪重分布為例,考慮了摩擦速度修正與否對(duì)模擬結(jié)果的影響。在低風(fēng)速下,考慮摩擦速度修正對(duì)模擬結(jié)果的影響不顯著。在高風(fēng)速下考慮摩擦速度修正后,立方體附近顆粒較多的馬蹄形區(qū)域內(nèi)摩擦速度與質(zhì)量濃度的變化最為顯著。風(fēng)速越高,計(jì)算域中雪�？倲�(shù)的減少幅度越大,計(jì)算域內(nèi)的侵蝕或沉積質(zhì)量通量也越大。
[Abstract]:The phenomenon of wind-induced snow drift was simulated by Lagrangian method. In the numerical simulation, the modification of the surface friction velocity of snow layer by mass concentration after particle movement was taken into account. Taking the snow redistribution around the cube as an example, the effect of friction velocity correction on the simulation results is considered. At low wind speed, the effect of friction velocity correction on the simulation results is not significant. After considering the friction velocity correction at high wind speed, the variation of friction velocity and mass concentration in the horseshoe region with more particles near the cube is most significant. The higher the wind speed is, the greater the reduction of the total amount of snow particles in the computational domain is, and the larger the erosion or sediment mass flux in the calculated domain is.
【作者單位】： 同濟(jì)大學(xué)土木工程防災(zāi)國(guó)家重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金面上項(xiàng)目(51478359,51778492) 科技部國(guó)家重點(diǎn)實(shí)驗(yàn)室基金項(xiàng)目(SLDRCE14-B-10)
【分類(lèi)號(hào)】：TU312.1
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本文編號(hào)：2022973