. Blo-Wiper is a project p roposed by Techno Brozek Enter prise to Malaysian government in 3rd National Car Project (NNCP). According to a feasibility study conducted by them, conventional windshield wiper is less effective during he avy rains especially for count ries located at equatorial . They came out with Blo -Wiper idea which is a novel system that combin ed two mechanisms ; wiping and blowing . Their first white paper is covered on feasibility study and concept development. Then, they continue their Research and Development (R&D) from conceptual design to computer simulation analysis by using Proof of Concept (PoC) proc ess. Interaction of ra in droplets with blowing air is simulated by using Computational Fluid Dy namics(CFD). CFD re sult for windshield wiper with blowing air proven that rain droplet s are shattered and repelled towards left and right of boundary layer. Meanwhile, without air blowing, the rains droplets falling down on floor boundary layer. Rain Droplets R emoving Width (RDRW) for a system with wiping and blowing is 76mm while conventional system is zero . That means, Blo-Wiper mechanisms ; wiping and blowing is bet ter than conventional mechan ism; wiping only. The objective o f this white paper is to publish R&D progress which is development from conceptual phase to numerical simulation phase. Keywords: Blo-Wiper, Windshield Wiper, 3rd National Car Project , Computational Fluid Dynamics , Proof of Concept, Small Medium Enterprise , Rain Droplet Removing Width 1. Introduction On 26 -November -2018, Techno Brozek Entrep rise has submitted Blo-Wiper proposal to Ministry of International Trade and Industry (MITI) , Malaysia. At same time, they also published a white paper in engrXiv [1]. The main purpose of the white paper is to introduce a new c oncept ual d esign of windshield wiper called Blo-Wiper. It’s also suggested a novel method how to develop Small Medium Enterprise (SME) in 3rd National Car Project (NNCP) . Besides , the readers o f the white paper can get info about Malaysian SMEs capabilities in automotive manufacturing sector . The NNCP main function is to create an ecosystem that will produce thousand new high skilled jobs for local talents and boost Malaysia economy. The previous two national car projects ; Perusahaan Otomobil Nasional (PROTON ) and Perusahaan Otomobil Kedua (PERODUA ) are using public funds for paid -up capitals and declared as Government Linked Company (GLC) [2][3]. This time the approach is diff erent from previous . The car conceptual and project paid -up capitals are come from private sectors [4]. Thus, government has encouraged any parties from local and international to submit their proposals to MITI. Based on an official medi a statement, more than 2 0 proposals have been received and the government has approved RM20 millions for Researc h & Development (R&D) grants to stimulate the NNCP [5]. In this paper, the authors ’ intentions are to publish current R&D progress for Blo-Wiper project by using Proof of C oncept (PoC) process . A Turtle Diagram shows simplified details of PoC process as can be seen in Figure 1.0. Figure 1.0 Turtl e Diagram - PoC for Blo-Wiper 2.0 Methodology The initial concept of structural wind shield rubber is design based on modificat ion of conventional structure. Figure 2.0 below shows the conventional windshield rubber shape. Blowing structure is added and wiping structure is maintained. Therefore, Blo-Wiper have two rain droplet removing method s; wiping and blowing while conventiona l only has one method; wiping. Figure 2.0 Conventional Windshield Rubber Shape Comparison effectiveness on removing of rain droplet s between WITH and WITHOUT blowing method is simul ated by using Computational Fluid Dynamic (CFD) analysis. The pr ocess of evaluation must begin from a simple Blo -Wiper structure . It’s a proven method to understand interaction between rain droplets and air blowing. From results of the first analysis, seri es of improvements are compulsary until get optimum parameters and optimum design structure. Lastly, overall Blo -Wiper structure needs to be analysed and confirm its final performance. Figure 3.0 sho ws an initial concept of structural windshield rubber for Blo -Wiper. View Conceptual Design of Blo -Wiper [1] Figure 3.0 Initial Concept of Structural Windshield Rubber for Blo -Wiper The structure in Figure 3.0 is put in side a fixed volume . Then , five (5) rain droplets are set on top of the volume with certain distance an d height . Figure 4.0 be low shows the CFD geometry setup that use for evaluate the effectiveness of removing rain droplets WITH and WITHOUT air blowing. CFD simulatio n is simulate based on one hypothe sis and one assumption; a ir droplets WITH blowing air will not falling down on floor of boundary layer and effectivene ss of wiping method for WITH and WITHOUT blower is same. Figure 4.0 CFD Geometry S etup There are 6 initial set of parameters; air blowing speed ,Vs, diameter of rain droplet ,D, surface tension of rain droplet, σ, contact angle of rai n droplet ,ϴw, impact velocity, Vi , and inclination angle, ϴInc. Air blowing speed ,Vs is how much air speed at outlet of blowing structure. T he Vs value is determine by using Analogy method. If air pu rging out from human mouth is almost same value as air blowing speed , thus water droplets ca n be blown at same circumstance . A simpl e Design of Expe riment (DOE) is made to prove the Analogy. Figure 5.0 shows s ide by side comparison between DOE and actual experiment. Air blown from mouth was able t o blow a water drople t to a certain distance. According to a research, the average air speed of human blowing is 12m/s [6]. It is successful proven that the air speed value is sufficient enough to be set as an initial benchmark value . It will be tuned later according to numeri cal and experimental analysis . DOE ACTUAL Figure 5 .0 DOE vs ACTUAL of Air Blowing S peed Then, diameter of rain droplet, D, surface tension of rain droplet, σ, contact angle of rain droplet, ϴw, impact velocity, Vi , and inclination angle, ϴInc are constant values that decided from literature review . All parameters values are tabulated in Ta ble 1.0 and Figure 6 .0 shows a structure of rain droplet. Table 1.0 Initial Set of Parameters Values Parameter Value Air blowing speed ,Vs 12m/s [6] Diameter of rain droplet, D 2mm [ 7] Surface tension of rain droplet, σ 0.073 N/mm at 293K [8] Contact angle of rain droplet, ϴw 100o [9] Impact velocity, Vi 1m/s [7] Inclination angle, ϴInc 0o [7] Figure 6 .0 Rain Droplet Structure [10] 3.0 Results Table 2.0 below shows the CFD simulation results for WITHOUT and WITH blowing method. Phase One (1) shows the initial state for rain droplets. Both WITHOUT and WITH blowing method have a same conditions. There are no rain droplets falling down. For Phase T wo (2), rains droplets start moving and WITHOUT blowing method is moving down fa ster compared to WITH b lowing method. Significant different size of rain droplets can be seen in Phase T wo (2). Rains droplets exposed to air blowin g start to shattered. T he shattered of rains droplets is increasing on Phase T hree (3). At same time, rains dr oplets WI THOUT blowing method has maintain ed its size and keep moving downward. At Phase Four (4), rains droplets spreading on floor of boundary layer and win dshield rubber except rain droplets WITH blowing method . The rains droplets are shattered above air blowing and flying towards left dan right of boundary layer. Table 2.0 CFD Simulation Result for WITH OUT and WITH Blowing Method Phase WITHOUT Blowing Method WITH Blowing Method 1 2 3 4 4.0 Discussions From simulation results inf orm that rain droplets WITHOUT blowing air (Wiping Only) are falling down and then spreading on floor of boundary layer floor. It’s because o f gravitational force and no external forces exert to stop the rain droplets . Meanwhile, high speed blowing air as colo red by red is blocking rain droplets from keep falling down as shown in Table 3 .0. High kinetic force generated from blowing air pushing rain droplets towards left and right of boundary layer (Wiping and Blowing). Table 3.0 Rain Droplets Movement Wiping Only Wiping and Blowi ng Rain D roplet s Removing W idth (RDRW) is a parameter to measure a distance of rain droplets blocked from touching boundary floor. RDRW for Wiping Only is zero. The wiper rubber only has one thin line for wiping based on width of wiper rubber touched on windshield [1]. Combination of wiping and blowing method has better RDRW which is 76mm . Refer to Table 4.0 below for details. Table 4.0 Rain Droplets Removing Width (RDRW) Wiping Only Wiping and Blowing On the other hand, air vortexes start generated wh en air purging out from air outlet. The air vortexes size becomes greater and moving towards left and right. From perspective of aerodynamic, air vortexes are not good for a system. The reason is it’s creating pressure different and chaos . The system is considered imbalance and uncontrollable with existence of strong air vortexes. It does can be considered as input of improvement for next phase . For initial phase is focus on understanding of air flow behaviour and improvements must be implemented on next phase. Table 5.0 shows air streamlines and vort exes generated from Phase one (1) until Phase four (4). Table 5.0 Air Streamlines for Wiping and Blowing Phase Air Streamlines for Wiping and Blowing Descriptions 1 Small air vortexes generated near the air outlet 2 Air vortexes size become bigger and two additional generated at bottom 3 All air vortexes size keep on increasing 4 All air vortexes moving towards left and right 5.0 Conclusion This research is successful meets the target objec tive. CFD simulati on result s have proven that windshield rubber WITH blowing air can repel rain droplets from falling down on floor of boundary layer. RDRW for wiper structure WITH blowing air is 76mm while RDRW for wiper structure WITHOUT blowing air is zero (0) . It’s shows that Proof of Concept (PoC) process is an reliable process that used by authors to conduct development from conceptual design to numerical simulation analysis. In itial structure of Blo -Wiper and set of initial parameters have been determined through this analysis. Improvements will be implemented in next research publication . Acknowledgments The present work was fully funded by Tech no Brozek Enterpise to help Malaysian government in 3rd National Car Project (NNCP) . Any further inquires, can contact at technobrozek @gmail.com .