Wei Jiahua1, Li Tiejian2, T.V. Tulaikova3, Chen Guoxin4, Wang Jinzhao5, Yan Diran6,  Chen Yueyang7

1, 2, 4–7 Tsinghua University, State Key Laboratory of Hydroscience& Engineering, Beijing, China

3 Moscow Institute of Physics and Technology (Dolgoprudny, Moscow Region, Russia)  

Problem setting. The idea for modified of the atmospheric thermal flow is suggested to get its additional lifting. The black powder with nano or micro-size powder can be introduced into heated air flow for particle’s absorption of a sunlight; additional heating of the powder inside upflow increases the altitude of thermal jet.

The purpose of the article is the optimization of the effect of upward air flow with additional powder. The analysis provides a possibility of the control for the main processes, in particular, preliminary optimizing of artificial heating of air jet and powder parameters. Calculation of the necessary powders masses, composition and particles size are presented in the paper.

Results. The results of the article prove the positive prospects for the proposed new method of controlling and enhancing in ascending air flow. Results show that a sun can provide a sufficiently heating of a metal hemisphere to obtain the air upflows for some weather/location condition.

Practical significance. For practice, the proposed method for modifying of the natural or artificial thermal provides more fast rainy cloud's formation. Fresh water shortage is becoming quite severe worldwide and precipitation enhancement methods inside clouds can solve this heavy problem for practice, but certainly thermal upwards are important because they transfer the necessary amount of water into clouds and participate condensation. 

Wei Jiahua, Li Tiejian, Tulaikova T.V., Chen Guoxin, Wang Jinzhao, Yan Diran, Chen Yueyang. The modification of atmospheric thermal flow to get high-altitude heating with additional lifting. Science Intensive Technologies. 2021. V. 22. № 6. P. 25−36. DOI: https://doi.org/10.18127/j19998465-202106-03

1. Monin A.S., Yaglom A.M. Statistical Fluid Mechanics, Volume II Mechanics of Turbulence. Massachusess Inc. of Technol., USA, 1975.
2. Emanuel K.A. Atmospheric convection. Oxford University Press, Oxford, 1994.
3. Wulfson N.I., Levin L.M. Meteotron as a means of influencing the atmosphere. M. Hydrometeoizdat. 1987. 130 p. 
4. Andreev V., Panchev S. Dynamics of atmospheric thermals. Hydrometeoizdat. Leningrad. 1975. 
5. Wang G Q, Zhong D Y, Li T J, et al. Sky River: Discovery, concept, and implications for future research. Sci Sin Tech. 2016. V. 46. P. 649–656. 6. Wei JiaHua, J. Qiu, T, Li, et al. Cloud and precipitation interference by strong low-frequency sound wave. Sci. Chin. Tech. Sci. 2020. V.63. https://doi.org/10.1007/s11431-019-1564-9
6. Wolfson A. N., Borodin O. O. Self-similar propagation modes of a nonstationary high-temperature convective jet in an adiabatic atmosphere. Appl. Mech. Techn. Phys. 2001. V. 42(2). 81–87.
7. Ingel L.Kh. et.al. To the theory of convective flows in a rotating stratifying medium over a thermally inhomogeneous surface. 2020. Computational Continuum Mechanics. 2020. V. 13(3). P. 288–297. DOI: 10.7242/1999-6691/2020.13.3.23
8. Bjorn Stevens. Atmospheric moist convection. Annu. Rev. Earth Planet. Sci. 2005. V. 33. P. 605–43. DOI: 10.1146/annurev.earth.33.092203.122658
9. Arakawa A., Jung J.-H., Multiscale modeling of the moist-convective atmosphere – A review. 2011. V. 102. P. 263–285.
10. Zakinyan R., Zakinyan A., RyzhkovR., Avanesyan K. Convection of Moist Saturated Air: Analytical Study. MDPI Atmosphere. 2016. V.7, 8. DOI:10.3390/atmos7010008
11. Kopp G., Lean J.L. A new, lower value of total solar irradiance: Evidence and climate significance. Geophysical Research Letters. 2011. V. 38. № 1. https://doi.org/10.1029/2010GL045777
12. Futing Wu, Congbin Fu. Assessment of GEWEX/SRB version 3.0 monthly global radiation dataset over China. Meteorol Atmos Phys. 2011, v.112, 155–166. DOI 10.1007/s00703-011-0136-x 
13. Jursa, A.S. ed. Handbook of Geophysics and the Space Environment, UA Air Force Geophysics Laboratory, USA, 1985. Web.Report Number(s): AD-A-167000/9/XAB; AFGL-TR-85-0315 https://www.osti.gov/biblio/5572212-handbook-geophysicsspace-environment-edition-final
14. Online calculator. Azimuth and height of the sun above the horizon. Accessed 2020, 3 June. https://planetcalc.ru/4270/
15. Schlyter P. Computing planetary positions – a tutorial with worked examples. Home Page of Paul Schlyter, Stockholm, Sweden. Accessed 2020, 2 May. https://planetcalc.ru/320/ 
16. Landsberg G.S. Optics. Physmath-press, Moscow, 2003, 549.
17. Gorsky V.V., Pugach M.A. Laminar/turbulent heat exchange on the surface of a hemisphere by a supersonic air flow. Scientific notes of TsAGI, V. XL(6). P. 36–42. https://cyberleninka.ru/article/n/laminarno-turbulentnyy-teploobmen-na-poverhnosti-polusferyobtekaemoy-sverhzvukovym-potokom-vozduha 
18. Dew point. Accessed 2021, 15 Jun. https://vbokna.ru/kalkulyatory/tochka-rosy-2
19. Carslow H.G., Jaeger J.C. Conduction of heat in solids. Clarendon press. Oxford. 1964.
20. Isachenko V.P., Osipova V.A., Sukomel A.S. Heat transfer. Moscow, Energy. 1975. 488 p.