A CFD-DEM investigation of powder transport and aerosolization in ELLIPTA® dry powder inhaler.

A CFD-DEM investigation of powder transport and aerosolization in ELLIPTA® dry powder inhaler.
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对 ELLIPTA® 干粉吸入器中粉末传输和雾化的 CFD-DEM 研究。

DOI:
10.1016/j.powtec.2022.117817
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发表时间:
2022
期刊:
影响因子:
5.2
通讯作者:
Sundaresan,Sankaran
Sundaresan,Sankaran
中科院分区:
工程技术2区
文献类型:
--
作者:
Sulaiman,Mostafa;Liu,Xiaoyu;Sundaresan,Sankaran

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我们对商用ELLIPTA®吸入器中的空气和颗粒进行了计算流体动力学-离散元法(CFD-DEM)模拟。我们模拟了载体和原料药颗粒的流化、解聚和运输,采用了代表中度哮喘和极重度COPD患者的两种真实吸入谱,以及三种不同的口腔设计。在模拟的10种情况中,我们分别确定了离开吸口的气流中的细颗粒分数(FPF)、颗粒空间分布的时间演变、载体颗粒看到的平均空气(滑移)速度以及吸入器内载体-载体和载体-壁面碰撞的平均次数和正常撞击速度。在研究的情况下,航空母舰和航母-航母相互作用影响FPF,而航母-墙壁相互作用太不频繁,没有实质性的影响。模拟显示,即使只需要递送一种药物,也可以同时加载两个水泡
We have performed Computational Fluid Dynamics-Discrete Element Method (CFD-DEM) simulations of air and particles in a commercial ELLIPTA® inhaler. We simulated the fluidization, deagglomeration and transport of carrier and API particles, with two realistic inhalation profiles that are representative of moderate asthma and very severe COPD patients, and three different mouthpiece designs. In each of the ten cases simulated, we determined the fine particle fraction (FPF) in the stream leaving the mouthpiece, the temporal evolution of the spatial distribution of the particles, the mean air (slip) velocity seen by the carrier particles, and the average numbers and normal impact velocities of carrier–carrier and carrier–wall collisions inside the inhaler. In the cases examined, the air–carrier and carrier–carrier interactions affected the FPF, while the carrier–wall interactions were too infrequent to have a substantial effect. The simulations revealed the benefit of loading both blisters even when only a single medication needs to be delivered
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